We are in a race between knowledge and catastrophe. If we keep track of what is important, never lower our standards or forget why we are here, we have the ability to determine the fate of the world.

Most of the time you will fail, but you will also occasionally succeed. Those occasional successes make all the hard work and sacrifice worthwhile.

Everybody has to be able to participate in a future that they want to live for. That's what technology can do.

Nothing that has value, real value, has no cost. Not freedom, not food, not shelter, not healthcare.

I do not want to waste any time. And if you are not working on important things, you are wasting time.

As we move towards 8 or 10 billion people on the planet, there's a little less gold per capita. Each one of us will continue to be fighting over an ever smaller percentage of total resources. This is not a happy thought

I think we have a society which is spending more and more of its money on healthcare as a percent of GDP as a percent of a lot of things. I think that's a measure of success.