[In the Universe it may be that] Primitive life is very common and intelligent life is fairly rare. Some would say it has yet to occur on Earth.

We have made remarkable progress in the last hundred years, but if we want to continue, our future is in space.

TEAMWORK...means never having to take all the blame yourself.

Mankind's greatest achievements have come about by talking and its greatest failures by not talking. It doesn’t have to be like this.

I may contradict myself, but at least I don't contradict myself.

Science is not only a disciple of reason but, also, one of romance and passion.

Look up at the stars, not down at your feet.