Some mothers need happy children; others need unhappy ones-otherwise they cannot prove their maternal virtues.

Immature is the love of the youth, and immature his hatred of man and earth. His mind and the wings of his spirit are still tied down and heavy.

If you know the why, you can live any how.

There is no pre-established harmony between the furtherance of truth and the well-being of mankind.

The unselective knowledge drive resembles the indiscriminate sexual drive--signs of vulgarity!

I am the leading strings of the ego and the prompter of its concepts.

Those people have no real interest in a science who only begin to get excited about it when they themselves have made discoveries in it.