Isolation always perverts; when a man lives only among his own sort, he soon begins to believe that his sort are the best sort. This attitude breeds both the arrogance of the conservative and the bitterness of the radical.

Skepticism is not an end in itself; it is a tool for the discovery of truths.

Isolation always perverts; when a man lives only among his own sort, he soon begins to believe that his sort are the best sort. This attitude breeds both the arrogance of the conservative and the bitterness of the radical.

Parents - and teachers too - are woefully short-sighted when they try to protect the child from his mistakes, when they make the "right answer" more important than the quest for knowledge and good judgment. For what is not learned within one's self cannot be learned from another.

Perseverance is the most overrated of traits, if it is unaccompanied by talent; beating your head against a wall is more likely to produce a concussion in the head than a hole in the wall.

Nice things are done for our own sake, not for the sake of others. The pleasure must reside in the performance, not in the applause. Good deeds are, in a deeper psychological way, a favor to oneself. If this is not grasped, then our whole sense of personal relationships becomes warped.

Enemies, as well as lovers, come to resemble each other over a period of time.