“Philosophy is written in this grand book, the universe, which stands continually open to our gaze.”

Knowing thyself, that is the greatest wisdom.

Philosophy is written in that great book which ever lies before our eyes. I mean the universe, but we cannot understand it if we do not first learn the language and grasp the symbols, in which it is written.

The nature of the human mind is such that unless it is stimulated by images of things acting upon it from without, all remembrance of them passes easily away.

We cannot teach people anything; we can only help them discover it within themselves.

Holy Scripture could never lie or err…its decrees are of absolute and inviolable truth.

Holy Scripture could never lie or err…its decrees are of absolute and inviolable truth.

Nature is written in mathematical language.

Nothing occurs contrary to nature except the impossible, and that never occurs.

God is known by nature in his works, and by doctrine in his revealed word.

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

I’ve loved the stars too fondly to be fearful of the night.

The greatest wisdom is to get to know oneself.

I have never met a man so ignorant that I couldn’t learn something from him.

In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.

Mathematics is the key and door to the sciences.

The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.

It is very, very easy not to be offended by a book. You just have to shut it.

Books, the children of the brain.

The book of nature is a fine and large piece of tapestry rolled up, which we are not able to see all at once, but must be content to wait for the discovery of its beauty, and symmetry, little by little, as it graduallly comes to be more and more unfolded, or displayed.

Reading about nature is fine, but if a person walks in the woods and listens carefully, he can learn more than what is in books, for they speak with the voice of God.

For out of old fields, as men saith, Cometh all this new corn from year to year; And out of old books, in good faith, Cometh all this new science that men learn.

The secret of my success? It is simple. It is found in the Bible.

Having no new companions, nothing remained for him but to read.

We are as liable to be corrupted by books, as by companions.