I learned the value of hard work by working hard.

A champion is someone who gets up when he can't.

Speak softly and carry a big stick; you will go far.

Risk comes from not knowing what you're doing.

The past always looks better than it was. It's only pleasant because it isn't here.

I believe things cannot make themselves impossible.

The science of today is the technology of tomorrow.

That's one small step for a man, one giant leap for mankind.

I never learn anything talking. I only learn things when I ask questions.

Before anything else, preparation is the key to success.