You'll never do a whole lot unless you're brave enough to try.

It is greed to do all the talking but not to want to listen at all.

The secret to creativity is knowing how to hide your sources.

You shape your own destiny.

Everything I've ever done was out of fear of being mediocre.

Some people regard discipline as a chore. For me, it is a kind of order that sets me free to fly.

People who say it cannot be done should not interrupt those who are doing it.

All thinking men are atheists.

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.

What I stand for is what I stand on.

I wouldn't say I was the best manager in the business. But I was in the top one.

You don't need a weather man to know which way the wind blows

For every dark night, there's a brighter day

Do you want to know who you are? Don't ask. Act! Action will delineate and define you.

Memories of our lives, of our works and our deeds will continue in others.

I don’t think we are going to become extinct. We are very clever and very resourceful.

It's kind of fun to do the impossible.

Alone we can do so little; together we can do so much.

I'd rather be an optimist and a fool than a pessimist and right.

No leader can be too far ahead of his followers.

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