If we don't know where we are going, it can be helpful to know where we come from.

A state that does not educate and train women is like a man who only trains his right arm.

A hydrogen atom in a cell at the end of my nose was once part of an elephant's trunk. A carbon atom in my cardiac muscle was once in the tail of a dinosaur.

How terribly sad it was that people are made in such a way that they get used to something as extraordinary as living.

The most subversive people are those who ask questions.

An answer is always on the stretch of road that is behind you. Only a question can point the way forward.

The question of whether a thing is right or wrong, good or bad, must always be considered in relation to a persons needs.

Wasn’t it extraordinary to be in the world right now, wandering around in a wonderful adventure!

Since the Renaissance, people have had to get used to living their life on a random planet in the vast galaxy.

We are thrown together with a sprinkling of stardust.

Athens is like a sluggish horse, and I am the gadfly trying to sting it into life.

For me, I can not be right in anything unless there is no counter thoughts that contradict my wrong, in this case my thoughts will be right.

[God] has in mind a picture of what He intends to create. He breaks, cracks, chisels, and polishes until one day there emerges His vision . . . God has not yet finished with us.

We can please God by his power.

Just be yourself. Be honest, work towards a goal, and you'll achieve it.

Men are not allowed to think freely about chemistry and biology: why should they be allowed to think freely about political philosophy?

Remember, we know the end of the story of World War II and the Cold War. But day by day, living in fear of the Nazis and then in fear of the Soviets, the outcome was by no means certain.

If there's anyone still present whom I've failed to insult . . . I apologize.

Yesterday was a memory. Today was a hope.

Everything that we do is insignificant...and...it is very important that we do it!

You call for faith: I show you doubt, to prove that faith exists. The more of doubt, the stronger faith, I say, If faith o'ercomes doubt.