Unused ability, like unused muscles, will atrophy.

To be mature you have to realize what you value most... Not to arrive at a clear understanding of one's own values is a tragic waste. You have missed the whole point of what life is for.

I believe that anyone can conquer fear by doing the things he fears to do, provided he keeps doing them until he gets a record of successful experience behind him.

There are three fundamentals for human happiness - love and faith, and work which will produce at least a minimum of material security. These things must be made possible for all human beings, men and women alike.

Curiosity must be kept alive.

We will have to want peace, want it enough to pay for it, before it becomes an accepted rule.

The mind must be trained, rather than the memory.