If I hadn't given my money away, I'd have had more than anyone else on the planet.

Intermittency [in availability for wind and solar] changes the economics, particularly this requirement that the power company at all times be able to require power. That's large.

Talking to mothers, always brings it home because they're so anxious to do everything they can for their kids and so tragic for them.

It's fine to celebrate success but it is more important to heed the lessons of failure.

Being maniacal about something is very helpful.

Vaccines are a miracle; they're fantastic. Anything that makes people hesitate to give their children these vaccines according to the recommended schedule creates risk. Risk for the children who don't get vaccinated and risk for children, some of whom don't have an immune system, so they're benefiting from the fact that the community protection means the disease doesn't get to them.

Me and my dad are the biggest promoters of an estate tax in the US. It's not a popular position.