“If at first you don’t succeed, try management.”

I’d say I don’t believe in God, but I’m afraid He might hear me.

There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works.

There is no prescribed route to follow to arrive at a new idea. You have to make the intuitive leap.

Time travel may be possible, but it is not practical.

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.

I have experimental evidence that time travel is not possible.

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.

Just that working with Clint again is like coming home.

Everything is based on a simple rule: Quality is the best business plan, period.

A failure teaches you that something can’t be done-that way.

I am going to enjoy some other things apart from business.

If we go to work at 8 a.m. and go home at 5 p.m., this is not a high-tech company and Alibaba will never be successful. If we have that kind of 8-5 spirit, then we should just go and do something else.

The trick to any profession is making it look easy.

When somebody shares, everybody wins.

You may think using Google’s great, but I still think it’s terrible.