“I have experimental evidence that time travel is not possible.”

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

It matters if you just don’t give up.

We are all now connected by the Internet, like neurons in a giant brain.

One can’t prove that God doesn’t exist. But science makes God unnecessary. The laws of physics can explain the universe without the need for a creator.

Science can explain the universe without the need for a Creator.

I believe everyone should have a broad picture of how the universe operates and our place in it. It is a basic human desire. And it also puts our worries in perspective.

I like physics, but I love cartoons.

One is always a long way from solving a problem until one actually has the answer.

If you are lucky enough to find love, remember it is there and don’t throw it away.

When something is made idiot proof, they will just make better idiots.

Scientific discovery may not be better than sex, but the satisfaction lasts longer.

We only have to look at ourselves to see how intelligent life might develop into something we wouldn’t want to meet.

Intelligence is the ability to adapt to change.

What I meant by ‘we would know the mind of God’ is, we would know everything that God would know, if there were a God. Which there isn’t. I’m an atheist.

Time and space are finite in extent, but they don’t have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.

Life would be tragic if it weren’t funny.

Mathematicians come to the solution of a problem by the simple arrangement of the data, and reducing the reasoning to such simple operations, to judgments so brief, that they never lose sight of the evidence that serves as their guide.

Stories in families are colossally important. Every family has stories: some funny, some proud, some embarrassing, some shameful. Knowing them is proof of belonging to the family.

We took away your art because we thought it would reveal your souls. Or to put it more finely, we did it to prove you had souls at all.

Power is not sufficient evidence of truth.

Have regular hours for work and play; make each day both useful and pleasant, and prove that you understand the worth of time by employing it well. Then youth will be delightful, old age will bring few regrets, and life will become a beautiful success.

Rest and be kind, you don’t have to prove anything

Good words,” I replied. “But deeds must prove it also; and after he is well, remember you don’t forget resolutions formed in the hour of fear.

Christ cannot possibly have been a Jew. I don’t have to prove that scientifically. It’s a fact.