As the purse is emptied, the heart is filled.

The three great problems of this century; the degradation of man in the proletariat, the subjection of women through hunger, the atrophy of the child by darkness.

O youth! thou often tearest thy wings against the thorns of voluptuousness.

One cannot resist an idea whose time has come.

It is the essence of truth that it is never excessive.... We must not resort to the flame where only light is required.

Sublime upon sublime scarcely presents a contrast, and we need a little rest from everything, even the beautiful.

...It all seemed to him to have disappeared as if behind a curtain at a theater. There are such curtains that drop in life. God is moving on to the next act.