Profundity of thought belongs to youth, clarity of thought to old age.

Character is determined more by the lack of certain experiences than by those one has had.

On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.

We must learn to love, learn to be kind, and this from the earliest youth; if education or chance give us no opportunity to practice these feelings, our soul becomes dry and unsuited even to understanding the tender inventions of loving people.

In the end one only experiences oneself.

Even great spirits have only their five-fingers' breadth of experience - just beyond it their thinking ceases and their endless empty space and stupidity begins.