It is always to early to quit.

If there is no fun in it, something is wrong with all you are doing.

You will soon break the bow if you keep it always stretched.

Every individual forms his own estimate of himself and that basic estimate goes far toward determining what he becomes.

Believe in yourself! Have faith in your abilities! Without a humble but reasonable confidence in your own powers you cannot be successful or happy.

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

Live your life and forget your age.