Roger Bacon

[I]f in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations…

— Roger Bacon

Knowledge of languages is the doorway to wisdom.

— Roger Bacon

It is not necessarily impossible for human beings to fly, but it so happens that God did not give them the knowledge…

— Roger Bacon

“Now there are four chief obstacles in grasping truth, which hinder every man, however learned, and scarcely allow anyone to win a…

— Roger Bacon

There are four great sciences, without which the other sciences cannot be known nor a knowledge of things secured ... Of these…

— Roger Bacon

There are in fact four very significant stumbling blocks in the way of grasping the truth, which hinder every man however learned,…

— Roger Bacon

All science requires mathematics. [Editors' summary of Bacon's idea, not Bacon's wording.]

— Roger Bacon

If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundation…

— Roger Bacon

There are in fact four very significant stumblingblocks in the way of grasping the truth, which hinder every man however learned, and…

— Roger Bacon

To ask the proper question is half of knowing

— Roger Bacon

It is easier for a man to burn down his own house than to get rid of his prejudices.

— Roger Bacon

“Wissenschaft ist Macht.”

— Roger Bacon

All sciences are connected; they lend each other material aid as parts of one great whole, each doing its own work, not…

— Roger Bacon

All science requires mathematics. The knowledge of mathematical things is almost innate in us. This is the easiest of sciences, a fact…

— Roger Bacon

Half of science is asking the right questions.

— Roger Bacon

Vacuum stands and remains a mathematical space. A cube placed in a vacuum would not displace anything, as it would displace air…

— Roger Bacon

The calendar is intolerable to all wisdom, the horror of all astronomy, and a laughing stock from a mathematician's point of view.

— Roger Bacon

Atheists are like wild feral dogs wih no master. But Christians are like loving dogs with a giving and loving master. Domesticated…

— Roger Bacon

Argument is conclusive, but it does not remove doubt.

— 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

The conquest of learning is achieved through the knowledge of languages.

— Roger Bacon

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

— Roger Bacon

Few have attained to consummate wisdom in the perfection of philosophy: Solomon attained to it, and Aristotle in relation to his times,…

— Roger Bacon

But we must here state that we should not see anything if there were a vacuum. But this would not be due…

— Roger Bacon

As regards authority I so proceed. Boetius says in the second prologue to his Arithmetic, 'If an inquirer lacks the four parts…

— Roger Bacon