The city needs a car like a fish needs a bicycle.

Clearly, there are many places where diesel is king or gas-turbine is king, or IC engines will win, but there are many places in the world where, as we've seen, they just won't do the job. The modern version of the Stirling engine has some very, very attractive characteristics, and we're trying to optimize it for some of those applications.

The word entrepreneur is associated with success and adventure. From my life, the only thing I can tell you that's consistently associated with entrepreneurship is failure, and the only thing consistently associated with invention is frustration. There is a long road between the idea and the reality.

There is just so much stuff in the world that, to me, is devoid of any real substance, value, and content that I just try to make sure that I am working on things that matter.

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.

If history is any indication, all truths will eventually turn out to be false.

In the culture of America, in a free culture, you get what you celebrate. And in this culture, we have two obsessions, become a group that becomes a group that celebrates sports heroes and entertainment heroes. There's no room left for kids to see even a little bit of the opportunities to really, really get excited about becoming an inventor, an engineer, or a scientist, a problem solver.