A man is crazy who writes a secret in any other way than one which will conceal it from the vulgar. — Roger Bacon Copy Share Image
It is easier for a man to burn down his own house than to get rid of his prejudices. — Roger Bacon Copy Share Image
There are in fact four very significant stumbling blocks in the way of grasping the truth, which hinder every man however learned,… — Roger Bacon Copy Share Image
First, by the figurations of art there be made instruments of navigation without men to row them, as great ships to brooke… — Roger Bacon Copy Share Image
No one really knew the sciences except the Lord Robert, Bishop of Lincoln, by reason of his length of life and experience,… — Roger Bacon Copy Share Image
As regards authority I so proceed. Boetius says in the second prologue to his Arithmetic, 'If an inquirer lacks the four parts… — Roger Bacon Copy Share Image
There are in fact four very significant stumblingblocks in the way of grasping the truth, which hinder every man however learned, and… — Roger Bacon Copy Share Image
One man alone had really known the sciences, namely, Robert, Bishop of Lincoln. — Roger Bacon Copy Share Image
For if any man who never saw fire proved by satisfactory arguments that fire burns. His hearer's mind would never be satisfied,… — Roger Bacon Copy Share Image
In the mathematics I can report no deficience, except that it be that men do not sufficiently understand the excellent use of… — Roger Bacon Copy Share Image
[I]f in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge… — Roger Bacon Copy Share Image
It is not necessarily impossible for human beings to fly, but it so happens that God did not give them the knowledge of how… — Roger Bacon Copy Share Image
“Now there are four chief obstacles in grasping truth, which hinder every man, however learned, and scarcely allow anyone to win a clear title… — Roger Bacon Copy Share Image
There are four great sciences, without which the other sciences cannot be known nor a knowledge of things secured ... Of these sciences the… — Roger Bacon Copy Share Image
There are in fact four very significant stumbling blocks in the way of grasping the truth, which hinder every man however learned, and scarcely… — Roger Bacon Copy Share Image
All science requires mathematics. [Editors' summary of Bacon's idea, not Bacon's wording.] — Roger Bacon Copy Share Image
If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundation of knowledge… — Roger Bacon Copy Share Image
There are in fact four very significant stumblingblocks in the way of grasping the truth, which hinder every man however learned, and scarcely allow… — Roger Bacon Copy Share Image
It is easier for a man to burn down his own house than to get rid of his prejudices. — Roger Bacon Copy Share Image
![“[I]f in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge in mathematics, in so far as disposed through it we are able to reach certainty in other sciences and truth by the exclusion of error.” quote by Roger Bacon](https://sms4smile.com/quotes/img-quotes/d13/roger-bacon-15067_able_i-f-in-other-sciences-we-should-arrive-a_24209.jpg)
![“There are four great sciences, without which the other sciences cannot be known nor a knowledge of things secured ... Of these sciences the gate and key is mathematics ... He who is ignorant of this [mathematics] cannot know the other sciences nor the affairs of this world.” quote by Roger Bacon](https://sms4smile.com/quotes/img-quotes/555/roger-bacon-15067_affair_there-are-four-great-sciences-without-wh_575596.jpg)
![“All science requires mathematics. [Editors' summary of Bacon's idea, not Bacon's wording.]” quote by Roger Bacon](https://sms4smile.com/quotes/img-quotes/49e/roger-bacon-15067_editors_all-science-requires-mathematics-editors_697422.jpg)
