Requiring a lot of time does not make a task important.

Get good at being a troublemaker and saying sorry when you really screw up

In all cases where doubt crops up, ask yourself, "If I had a gun to my head and had to do it, how would I do it?" It's not as hard as you think.

I gauge success in years, not weeks. The weekend box-office approach to book launches is short sighted and encourages crappy books.

After decades of hauling telescopes around in the back of vans and going up to high altitude locations and so forth, I did finally build an observatory, here on Sonoma mountain.

It is predicated on the assumption that you dislike what you are doing during the most physically capable years of your life. This is a nonstarter—nothing can justify that sacrifice.

Someday is a dis-ease that will take your dreams to the grave with you.