What was silent in the father speaks in the son, and often I found in the son the unveiled secret of the father.

What does not destroy me, makes me stronger.

A book calls for pen, ink, and a writing desk; today the rule is that pen, ink, and a writing desk call for a book.

For art to exist, for any sort of aesthetic activity or perception to exist, a certain physiological precondition is indispensable: intoxication.

That which does not kill me makes me stronger.

If ye would go up high, then use your own legs! Do not get yourselves carried aloft; do not seat yourselves on other people's backs and heads.

If an architect wants to strengthen a decrepit arch, he increases the load laid upon it, for thereby the parts are joined more firmly together.

Convictions are more dangerous foes of truth than lies.

If we lacked curiosity, we should do less for the good of our neighbor. But, under the name of duty or pity, curiosity steals into the home of the unhappy and the needy. Perhaps even in the famous mother-love there is a good deal of curiosity.

Men after death ... are understood worse than men of the moment, but heard better.