Repartee is altogether a natural endowment, and is the lightning of the mind.

Experience is the name men give to their follies or their sorrows.

Few persons enjoy real liberty; we are all slaves to ideas or habits.

I see that you believe in love such as the poets and romancers have represented... The poets represent love as the sculptors design beauty, as the musicians create melody; that is to say, endowed with an exquisite nervous organization, they gather up with discerning ardor the purest elements of life, the most beautiful lines of matter, and the most harmonious voices of nature.... To try to find in real life such love as this, eternal and absolute, is the same thing as to seek on the public squares such a woman as Venus or to expect nightingales to sing the symphonies of Beethoven.

I cannot help it - in spite of myself, infinity torments me.

What a frightful weapon is human thought! It is our defense and our safeguard, the most precious gift that God has made us. It is ours and it obeys us; we may launch it forth into space, but, once outside of our feeble brains, it is gone; we can no longer control it.

Man is a pupil, pain is his teacher.