You just can't beat the person who never gives up.

Babe Ruth

Rest but never quit. Even the sun has a sinking spell each evening. But it always rises the next morning. At sunrise, every soul is born again.

Muhammad Ali

It is not enough to take steps which may someday lead to a goal; each step must be itself a goal and a step likewise.

Johann Wolfgang von Goethe

Dedicate yourself.

Nike

If you focus on results, you will never change. If you focus on change, you will get results.

Jack Dixon

One person can make a difference, and everyone should try.

John F. Kennedy