“I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.”

“It's not as though we can keep burning coal in our power plants. Coal is a finite resource, too. We must find alternatives, and it's a better idea to find alternatives sooner then wait until we run out of coal, and in the meantime, put God knows how many trillions of tons of CO2 that used to be buried underground into the atmosphere.”

“Great companies are built on great products.”

“I had so many people try to talk me out of starting a rocket company, it was crazy.”

“I've been to Disneyland, like, 10 times. I'm getting really tired of Disneyland.”

“Why should all virtue work in one and the same way? Why should all give dollars? It is very inconvenient to us country folk, and we do not think any good will come of it. We have not dollars; merchants have; let them give them. Farmers will give corn; poets will sing; women will sew; laborers will lend a hand; the children will bring flowers.”

“If we suddenly plant our foot, and say, - I will neither eat nor drink nor wear nor touch any food or fabric which I do not know to be innocent, or deal with any person whose whole manner of life is not clear and rational, we shall stand still. Whose is so? Not mine; not thine; not his. But I think we must clear ourselves each one by the interrogation, whether we have earned our bread to-day by the hearty contribution of our energies to the common benefit? and we must not cease to tend to the correction of these flagrant wrongs, by laying one stone aright every day.”

“A man or woman is seldom happy unless he or she is sustaining him or herself and making a contribution to others.”