One man alone had really known the sciences, namely, Robert, Bishop of Lincoln. — Roger Bacon Copy Share Image
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
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
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
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
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
“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
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
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
All science requires mathematics. [Editors' summary of Bacon's idea, not Bacon's wording.] — Roger Bacon Copy Share
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
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
It is easier for a man to burn down his own house than to get rid of his prejudices. — Roger Bacon Copy Share
All sciences are connected; they lend each other material aid as parts of one great whole, each doing its own work, not for itself… — Roger Bacon Copy Share
All science requires mathematics. The knowledge of mathematical things is almost innate in us. This is the easiest of sciences, a fact which is… — Roger Bacon Copy Share
