Neglect of mathematics work injury to all knowledge, since he who is ignorant of it cannot know the other sciences or things of this world. And what …

- Roger Bacon

To ask the proper question is half of knowing.

- Roger Bacon

Reasoning draws a conclusion, but does not make the conclusion certain, unless the mind discovers it by the path of experience.

- Roger Bacon

Cease to be ruled by dogmas and authorities; look at the world!

- Roger Bacon

Mathematics is the gate and key to science.

- Roger Bacon

There are four chief obstacles in grasping truth ... namely, submission to faulty and unworthy authority, influence of custom, popular prejudice, and…

- Roger Bacon

A little learning is a dangerous thing but none at all is fatal.

- Roger Bacon

There are two modes of knowledge: through argument and through experience. Argument brings conclusions and compels us to concede them, but it does no…

- Roger Bacon

No one really knew the sciences except the Lord Robert, Bishop of Lincoln, by reason of his length of life and experience, as well as of his studious…

- Roger Bacon