Patience is a virtue, and I'm learning patience. It's a tough lesson.

Failure is an option here. If things are not failing, you are not innovating enough.

There are really two things that have to occur in order for a new technology to be affordable to the mass market. One is you need economies of scale. The other is you need to iterate on the design. You need to go through a few versions.

Entrepreneurship is like eating glass and walking on hot coals at the same time

It's obviously tricky to convert cellulose to a useful biofuel. I think actually the most efficient way to use cellulose is to burn it in a co-generation power plant. That will yield the most energy and that is something you can do today.

The key test for an acronym is to ask whether it helps or hurts communication.

It is despairing to consider that the cost and reliability of access to space have barely changed since the Apollo era over three decades ago. Yet in virtually every other field of technology, we have made great strides in reducing cost and increasing capability.