Is not wounded vanity the mother of all tragedies?

You lovers of knowledge! So what have you done out of your love of knowledge up to now? Have you already stolen and murdered so as to know how a thief and a murderer feels?

Many deeds are done so as to forget another deed: there are also opiate activities. I exist so that another will be forgotten.

Early in the morning, at break of day, in all the freshness and dawn of one's strength, to read a book -I call that vicious!

Men use a new lesson or experience later on as a ploughshare or perhaps also as a weapon; women at once make it into an ornament.

Idleness is the beginning of all psychology. What? Could it be that psychology is ? a vice?

Compulsion precedes morality, indeed morality itself is compulsion for a time, to which one submits for the avoidance of pain.