When it comes down to it, I let them think what they want. If they care enough to bother with what I do, then I'm already better than them.

I don't think necessity is the mother of invention. Invention ... arises directly from idleness, possibly also from laziness. To save oneself trouble.

I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion'.

Don't find fault, find a remedy; anybody can complain

It's the little details that are vital. Little things make big things happen.

All thinking men are atheists.

Be yourself, let you come through.

We are citizens of the world. The tragedy of our times is that we do not know this.

It's not whether you got knocked down; it's whether you get back up.

Ideas come from everything

What lies behind us and what lies before us are tiny matters compared to what lies within us.

I invented my life by taking for granted that everything I did not like would have an opposite, which I would like.

I may not have gone where I intended to go, but I think I have ended up where I needed to be.

Be yourself; everyone else is already taken.

If you can accept losing, you can't win.

No great discovery was ever made without a bold guess.

Somewhere, something incredible is waiting to be known.

If you're not prepared to be wrong, you'll never come up with anything original.

Start by doing what is necessary, then what is possible, and suddenly you are doing the impossible.

Man needs his difficulties because they are necessary to enjoy success.

As long as I'm in great shape, nobody beats me, for sure.