A man of courage never needs weapons, but he may need bail.

Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development

I would die happy if I knew that on my tombstone could be written these words, "This man was an absolute fool. None of the disastrous things that he reluctantly predicted ever came to pass!"

A certain amount of opposition is a great help to a man. Kites rise against, not with, the wind.

Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development.

The artist does not illustrate science (but) he frequently responds to the same interests that a scientist does.