We need to figure out how to have the things we love, and not destroy the world.

I realized that a methane-oxygen rocket engine could achieve a specific impulse greater than 380.

And we need things in life that are exciting and inspiring. It can't just be about solving some awful problem. There have to be reasons to get up in the morning.

Let's think beyond the normal stuff and have an environment where that sort of thinking is encouraged and rewarded and where it's okay to fail as well. Because when you try new things, you try this idea, that idea... well a large number of them are not gonna work, and that has to be okay. If every time somebody comes up with an idea it has to be successful, you're not gonna get people coming up with ideas.

One bit of advice: it is important to view knowledge as sort of a semantic tree - make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there is nothing for them to hang on to.

I don't think very highly of Henrik Fisker. [...H]e thinks the reason we don't have electric cars is for lack of styling

I'm glad to see that BMW is bringing an electric car to market. That's cool.