If you think you are beaten, you are.
If you think you dare not, you don’t!
If you want to win, but think you can’t,
It’s almost a cinch you won’t.

If you think you’ll lose, you’re lost;
For out in the world we find
Success begins with a fellow’s will;
It’s all in the state of the mind.

Life’s battles don’t always go
To the stronger and faster man,
But sooner or later the man who wins
Is the man who thinks he can.

– Walter D. Wintle