"A man should hear a little music, read a little poetry, and see a fine picture every day of his life, in order that worldly cares may not obliterate the sense of the beautiful which God has implanted in the human soul."

"A mind that is stretched by a new experience can never go back to its old dimensions."

"May my son study history, for it is the only true psychology, and the only true philosophy."

"I have departed from this planet and I have left behind my poor earthly ones with their occupations which are as many as they are useless; at last I am living in the scintillating splendor of the stars..."