Quote by Karl Marx

“In the past a theory could get by on its beauty; in the modern world a successful theory has to work for a living.”

— Howard Wainer

“You can't live in the world without an idea of the world, but it's living that makes the ideas. You can't wait for a…

— Tony Kushner

“That' the thing about theories. You can theorize all you want, but at the end of the day when you theories become reality, when…

— Jane Green

“Knowing what's important comes from experiential feel, not theory. That's”

— Sebastian Marshall

“People conspire, that's not a theory.”

— Michael Palmero

“Need theories can thrive only in a context where the emphasis is on the individual rather than the community and where consumption is a…

— Edward T. Welch

“This is why theory can be so valuable: it can explain what will happen, even before you experience it.”

— Clayton M. Christensen

“We know things with our lives and we live that knowledge, beyond what any theory has yet theorized.”

— Catharine MacKinnon

“A theory is like medicine or government: often useless, sometimes necessary, always self-serving and, on occasion, lethal. It needs to be used with care,…

— Nassim Nicholas Taleb

“theory includes a transcendent idea, as do all great world narratives.”

— Neil Postman

“Ideas need to be converted into a theory of action on how it will accomplish a goal.”

— Dwight McNeill

“I have a theory that sometimes people think they need to talk as much as possible, almost as if talking more equates to knowing…

— Mary Mihalic