Society lives by faith, and develops by science.

Life alone can rekindle life.

At bottom there is but one subject of study: the forms and metamorphoses of mind. All other subjects may be reduced to that; all other studies bring us back to this study.

Faith is certitude without proofs ... Faith is a sentiment, for it is a hope; it is an instinct, for it precedes all outward instruction.

Time and space are fragments of the infinite for the use of finite creatures.

I wonder whether I should gain anything by the attempt to assume a character which is not mine. My wavering manner, born of doubt and scruple, has at least the advantage of rendering all the different shades of my thought, and of being sincere. If it were to become terse, affirmative, resolute, would it not be a mere imitation?

Learn to... be what you are, and learn to resign with a good grace all that you are not.