--- title: "Meaning & Key Takeaway of: One must always be careful of books," description: "\"One must always be careful of books,\" — Cassandra Clare" image: "https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg" --- # One must always be careful of books, ![“One must always be careful of books,” quote by Cassandra Clare](https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg) [Download](https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg) [Open image](https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg) > “One must always be careful of books,” [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Warns that books can shape thoughts and actions, urging vigilant consumption of ideas. **In simple terms:** Books influence behavior. Key Takeaway Read critically. Themes knowledge influence responsibility critical thinking education Mood thoughtful cautious Type advice cautionary When to use this quote - studying - research - personal development - media consumption Key Concepts information persuasion literacy Practical Applications - critical analysis - educational curricula Questions to Reflect On - How do you assess a book's impact? - What safeguards can you apply when reading? ★ ★ ★ ★ ★ No ratings yet [Be careful](https://sms4smile.com/quotes/about/be-careful/) [Book](https://sms4smile.com/quotes/about/book/) [Books](https://sms4smile.com/quotes/about/books/) [Careful](https://sms4smile.com/quotes/about/careful/) [Careful Books](https://sms4smile.com/quotes/about/careful-books-384338/) [City of fallen angels](https://sms4smile.com/quotes/about/city-of-fallen-angels/) [City of glass](https://sms4smile.com/quotes/about/city-of-glass/) [City of lost souls](https://sms4smile.com/quotes/about/city-of-lost-souls/) [Clockwork](https://sms4smile.com/quotes/about/clockwork/) [Clockwork angel](https://sms4smile.com/quotes/about/clockwork-angel/) [Clockwork princess](https://sms4smile.com/quotes/about/clockwork-princess/) [Infernal devices](https://sms4smile.com/quotes/about/infernal-devices/) [Inspirational](https://sms4smile.com/quotes/about/inspirational/) [Shadowhunters](https://sms4smile.com/quotes/about/shadowhunters/) [Tessa gray](https://sms4smile.com/quotes/about/tessa-gray/) [Will herondale](https://sms4smile.com/quotes/about/will-herondale/) [William herondale](https://sms4smile.com/quotes/about/william-herondale/) [Writer](https://sms4smile.com/quotes/about/writer/) ## Related quotes > [As the carriage whipped forward, they passed the alley she had spent so many days staring at—it was there, and then gone as they…](https://sms4smile.com/quotes/cassandra-clare/as-the-carriage-whipped-forward-they-passed-the-alley-she-had-spent/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [They say you cannot love two people equally at once,” she said. “And perhaps for others that is so. But you and Will—you are…](https://sms4smile.com/quotes/cassandra-clare/they-say-you-cannot-love-two-people-equally-at-once-she-said-and/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [I'm trying to figure out how someone could live in a brothel for a month and not notice. You must be terribly dull-witted." Tessa…](https://sms4smile.com/quotes/cassandra-clare/i-m-trying-to-figure-out-how-someone-could-live-in-a-brothel-for-a/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [It is the mundanes who look at me and see something they do not understand—a boy who is not quite white and not quite…](https://sms4smile.com/quotes/cassandra-clare/it-is-the-mundanes-who-look-at-me-and-see-something-they-do-not/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [I have lost everything. Lost everything. Everything. - William Herondale](https://sms4smile.com/quotes/cassandra-clare/i-have-lost-everything-lost-everything-everything-william-herondale/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Do reasons matter when there's nothing that can be done to change things.](https://sms4smile.com/quotes/cassandra-clare/do-reasons-matter-when-there-s-nothing-that-can-be-done-to-change/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“What kind of monster could possibly hate chocolate?" - Will Herondale”](https://sms4smile.com/quotes/cassandra-clare/what-kind-of-monster-could-possibly-hate-chocolate-will-herondale/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Bloodthirsty little beasts. Never trust a duck.- William Herondale](https://sms4smile.com/quotes/cassandra-clare/bloodthirsty-little-beasts-never-trust-a-duck-william-herondale/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“Such harsh truths so early in the morning cannot be good for digestion." - Will Herondale”](https://sms4smile.com/quotes/cassandra-clare/such-harsh-truths-so-early-in-the-morning-cannot-be-good-for/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Sometimes, when I have to do something I don't want to do, I pretend I'm a character from a book. It's easier to know…](https://sms4smile.com/quotes/cassandra-clare/sometimes-when-i-have-to-do-something-i-don-t-want-to-do-i-pretend-i/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [One must always be careful of books,' said Tessa, 'and what is inside them, for words have the power to change us.' 'I'm not…](https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books-said-tessa-and-what-is-inside-2/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [One must always be careful of books," said Tessa, "and what is inside them, for words have the power to change us.](https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books-said-tessa-and-what-is-inside/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [You speak of sacrifice, but it is not my sacrifice I offer. It is yours I ask of you," he went on. "I can…](https://sms4smile.com/quotes/cassandra-clare/you-speak-of-sacrifice-but-it-is-not-my-sacrifice-i-offer-it-is-yours/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“But—but...” Will sputtered. “Oh, leave it,” said Jem, kicking Will, not without affection, lightly on the ankle. “She annexed my plan!” “Will,” Tessa said…](https://sms4smile.com/quotes/cassandra-clare/but-but-will-sputtered-oh-leave-it-said-jem-kicking-will-not-without/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [If I might make a suggestion,” said Will. “About twenty paces behind us, in the Council room, is Benedict. If you’d like to go…](https://sms4smile.com/quotes/cassandra-clare/if-i-might-make-a-suggestion-said-will-about-twenty-paces-behind-us/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) ## More by Cassandra Clare > [Against his own will, almost, Will felt himself understanding; he would have done anything, he thought, told any lie, taken any risk, to make…](https://sms4smile.com/quotes/cassandra-clare/against-his-own-will-almost-will-felt-himself-understanding-he-would/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“So Jace is my actual family," Kit said. "But I can't go live with him, because him and his hot girlfriend are going off…](https://sms4smile.com/quotes/cassandra-clare/so-jace-is-my-actual-family-kit-said-but-i-can-t-go-live-with-him/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Clarissa," he said, "here with the vampire, I see. When things have settled a bit, we really must discuss you choice in pets..](https://sms4smile.com/quotes/cassandra-clare/clarissa-he-said-here-with-the-vampire-i-see-when-things-have-settled/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Must I go bound while you go free Must I love a manwho doesn't love me Must I be born with so little art…](https://sms4smile.com/quotes/cassandra-clare/must-i-go-bound-while-you-go-free-must-i-love-a-manwho-doesn-t-love/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [If you're texting Magnus to say 'I think u r kewl,' I'm going to kill you." "Who's Magnus?" Max inquired. "He's a warlock," said…](https://sms4smile.com/quotes/cassandra-clare/if-you-re-texting-magnus-to-say-i-think-u-r-kewl-i-m-going-to-kill/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“they all have always loved you Will Herondale, for you cannot hide what is good about yourself, however har you try.”](https://sms4smile.com/quotes/cassandra-clare/they-all-have-always-loved-you-will-herondale-for-you-cannot-hide/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“We work through this together, remember? No shutting me out. No epic sulks.” “I was figuring I could sulk for Idris in the next…](https://sms4smile.com/quotes/cassandra-clare/we-work-through-this-together-remember-no-shutting-me-out-no-epic/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“Lex malla, lex nulla,” said Julian with a regretful wave of his hand. It was the Blackthorn family motto: A bad law is no…](https://sms4smile.com/quotes/cassandra-clare/lex-malla-lex-nulla-said-julian-with-a-regretful-wave-of-his-hand-it/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Maybe that was why she couldn't cry, she realized, staring dry-eyed at the ceiling. Because what was the point in crying when there was…](https://sms4smile.com/quotes/cassandra-clare/maybe-that-was-why-she-couldn-t-cry-she-realized-staring-dry-eyed-at/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [I'm memorable, its true." -Magnus, pg.229-](https://sms4smile.com/quotes/cassandra-clare/i-m-memorable-its-true-magnus-pg-229/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“There is more to living than not dying.”](https://sms4smile.com/quotes/cassandra-clare/there-is-more-to-living-than-not-dying/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Unless there was a reason for me to stay.](https://sms4smile.com/quotes/cassandra-clare/unless-there-was-a-reason-for-me-to-stay/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [Love didn't make you weak, it made you stronger.](https://sms4smile.com/quotes/cassandra-clare/love-didn-t-make-you-weak-it-made-you-stronger/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [“I wasn’t just worried about him; I was worried about you, too. There’s something so . . . reassuring about you. And Jace is…](https://sms4smile.com/quotes/cassandra-clare/i-wasn-t-just-worried-about-him-i-was-worried-about-you-too-there-s/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [I firmly believe that you can't get a good movie without risking a bad movie.](https://sms4smile.com/quotes/cassandra-clare/i-firmly-believe-that-you-can-t-get-a-good-movie-without-risking-a/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) [Explore all 4,049 Cassandra Clare quotes ](https://sms4smile.com/quotes/author/cassandra-clare/) ## More Be careful quotes > [Be careful. I wouldn’t want anything to happen to the worst Spanish student in the history of the language.” I laughed. “No problemo.](https://sms4smile.com/quotes/kiersten-white/be-careful-i-wouldn-t-want-anything-to-happen-to-the-worst-spanish/) [Kiersten White](https://sms4smile.com/quotes/author/kiersten-white/) > [If I held all the thoughts of the world in my hand, I would be careful not to open it.](https://sms4smile.com/quotes/bernard-le-bovier-de-fontenelle/if-i-held-all-the-thoughts-of-the-world-in-my-hand-i-would-be-careful/) [Bernard le Bovier de Fontenelle](https://sms4smile.com/quotes/author/bernard-le-bovier-de-fontenelle/) > [You've got to be careful against classy fighters, especially counter-punchers because if you go for the finish too early, you can end up getting…](https://sms4smile.com/quotes/carl-froch/you-ve-got-to-be-careful-against-classy-fighters-especially-counter/) [Carl Froch](https://sms4smile.com/quotes/author/carl-froch/) > [ \[A\]s you partake of the world's bill of fare, that's darned good advice to follow. Do a lot of spitting out the hot air.… ](https://sms4smile.com/quotes/dr-seuss/a-s-you-partake-of-the-world-s-bill-of-fare-that-s-darned-good-advice/) [Dr. Seuss](https://sms4smile.com/quotes/author/dr-seuss/) > [We must remember that intelligence is not enough. Intelligence plus character--that is the goal of true education. The complete education gives one not only…](https://sms4smile.com/quotes/martin-luther-king-jr/we-must-remember-that-intelligence-is-not-enough-intelligence-plus/) [Martin Luther King, Jr](https://sms4smile.com/quotes/author/martin-luther-king-jr/) > [I have to be careful to get out before I become the grotesque caricature of a hatchet-faced woman with big knockers.](https://sms4smile.com/quotes/jamie-lee-curtis/i-have-to-be-careful-to-get-out-before-i-become-the-grotesque/) [Jamie Lee Curtis](https://sms4smile.com/quotes/author/jamie-lee-curtis/) > [Our communications reflect in our countenance. Therefore, we must be careful not only what we communicate, but also how we do so. Souls can…](https://sms4smile.com/quotes/l-lionel-kendrick/our-communications-reflect-in-our-countenance-therefore-we-must-be/) [L. Lionel Kendrick](https://sms4smile.com/quotes/author/l-lionel-kendrick/) > [Well sometimes, culture can stifle talent, so you have to be careful.](https://sms4smile.com/quotes/monty-williams/well-sometimes-culture-can-stifle-talent-so-you-have-to-be-careful/) [Monty Williams](https://sms4smile.com/quotes/author/monty-williams/) > [And so we have to be careful with looking at additional stimulus that we don't provoke an increase in the bond rate and then…](https://sms4smile.com/quotes/franklin-raines/and-so-we-have-to-be-careful-with-looking-at-additional-stimulus-that/) [Franklin Raines](https://sms4smile.com/quotes/author/franklin-raines/) > [Be careful who you might trust the Devil was once an angel too.](https://sms4smile.com/quotes/anonymous/be-careful-who-you-might-trust-the-devil-was-once-an-angel-too/) [Anonymous](https://sms4smile.com/quotes/author/anonymous/) > [One must always be careful of books," said Tessa, "and what is inside them, for words have the power to change us.](https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books-said-tessa-and-what-is-inside/) [Cassandra Clare](https://sms4smile.com/quotes/author/cassandra-clare/) > [He who believes in God is not careful for the morrow, but labors joyfully and with a great heart. 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If you're trying to be careful with your wallet, especially with the economy right now,…](https://sms4smile.com/quotes/christian-siriano/a-bad-investment-is-going-for-quantity-over-quality-if-you-re-trying/) [Christian Siriano](https://sms4smile.com/quotes/author/christian-siriano/) [Browse all 989 Be careful quotes ](https://sms4smile.com/quotes/about/be-careful/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "One must always be careful of books,", "creator": { "@type": "Person", "name": "Cassandra Clare" }, "isPartOf": { "@id": "https://sms4smile.com/quotes/#website" }, "url": "https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books/", "about": { "@type": "Thing", "name": "Be careful" }, "@id": "https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books/#quotation", "image": { "@type": "ImageObject", "@id": "https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg", "contentUrl": "https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg", "url": "https://sms4smile.com/quotes/i/86c/cassandra-clare-9_be-careful_one-must-always-be-careful-of-books-4719_47192.jpg", "width": 1080, "height": 1080, "caption": "“One must always be careful of books,” — Cassandra Clare", "creditText": "SMS4Smile Quotes", "creator": { "@id": "https://sms4smile.com/quotes/#organization" } } }, { "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://sms4smile.com/" }, { "@type": "ListItem", "position": 2, "name": "Quotes", "item": "https://sms4smile.com/quotes/" }, { "@type": "ListItem", "position": 3, "name": "Cassandra Clare", "item": "https://sms4smile.com/quotes/author/cassandra-clare/" }, { "@type": "ListItem", "position": 4, "name": "One must always be careful of...", "item": "https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books/" } ], "@id": "https://sms4smile.com/quotes/cassandra-clare/one-must-always-be-careful-of-books/#breadcrumb" }, { "@type": "WebSite", "@id": "https://sms4smile.com/quotes/#website", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "publisher": { "@id": "https://sms4smile.com/quotes/#organization" } }, { "@type": "Organization", "@id": "https://sms4smile.com/quotes/#organization", "name": "SMS4Smile Quotes", "url": "https://sms4smile.com/quotes/", "logo": { "@type": "ImageObject", "url": "https://sms4smile.com/quotes/wp-content/themes/sq/assets/icons/icon-512.png", "width": 512, "height": 512 } } ] } ```