People become really quite remarkable when they start thinking that they can do things. When they believe in themselves they have the first secret of success.

Don't bother. The glass is half-empty.

Masterly retreat is in itself a victory.

The negative principle negates. The positive principle creates. The negative principle doubts. The positive principle believes. The negative principle accepts defeat. The positive principle goes for victory.

Fear is never a reason for quitting; it is only an excuse.

Nothing can stand in the way of the man who focuses his entire self on a problem.

Remember: what you think you will become - good or bad, weak or strong, defeated or victorious.