The heroic man does not pose; he leaves that for the man who wishes to be thought heroic.

Progress comes from the intelligent use of experience.

Life is a checkerboard, and the player opposite you is time. If you hesitate before moving, or neglect to move promptly, your men will be wiped off the board by time. You are playing against a partner who will not tolerate indecision!

If I supply you with a thought, you may remember it and you may not. But if I can make you think a thought for yourself, I have indeed added to your stature.

Every knock is a boost.

It does not make much difference what a person studies-all knowledge is related, and the man who studies anything, if he keeps at it, will be learned.

Nothing is permanent but change.