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.

Think big and don't listen to people who tell you it can't be done. Life's too short to think small.

The best results I have had in my life; the most enjoyable times, have all come from asking the simple question: 'What is the worst that could happen?'

Role models who push us to exceed our limits, physical training that removes our spare tires, and risks that expand our sphere of comfortable action are all examples of eustress—stress that is healthful and the stimulus for growth.

Fear is your friend. It is an indicator. Sometimes it shows you what you shouldn't do, more often than not it shows you what you should do.

People really do think they have to choose between high stress and high reward jobs, and low stress and low reward jobs.

The way that you become world-class is... by asking good questions.