The degree of civilization in a society can be judged by entering its prisons.

It's the great mystery of human life that old grief passes gradually into quiet tender joy.

I cannot truly imagine a truly great person who hasn't suffered.

The mystery of human existence lies not in just staying alive, but in finding something to live for.

The secret of man's being is not only to live but to have something to live for.

You are a man still young, so to say, in your first youth and so put intellect above everything.

Love every leaf, every ray of light. Love the animals, love the plants, love each separate thing. Loving all, you will perceive the mystery of God in all.