We must always change, renew, rejuvenate ourselves; otherwise, we harden.

The highest happiness, the purest joys of life, wear out at last.

Great passions are incurable diseases.

It's true that nothing in this world makes us so necessary to others as the affection we have for them.

The light is there, and colors surround us. However, if there were no light nor colors in our own eye, we wouldn't perceive such things outside of us.

The formation of one's character ought to be everyone's chief aim.

I treat my heart like a sick child and gratify its every fancy