“My mentality is that of a samurai. I would rather commit seppuku than fail.”

“I have made the mistaken assumption - and I will attempt to be better at this - of thinking that because somebody is on Twitter and is attacking me that it is open season. And that is my mistake.”

“I started SpaceX with the expectation of failure.”

“Even if producing CO2 was good for the environment, given that we're going to run out of hydrocarbons, we need to find some sustainable means of operating.”

“Optimism, pessimism, f**k that; we're going to make it happen. As God is my bloody witness, I'm hell-bent on making it work.”

“Nature has not intended mankind to work from eight in the morning until midnight without that refreshment of blessed oblivion which, even if it only lasts twenty minutes, is sufficient to renew all the vital forces.”

“When there is no job related stress, you are more aware of your mate and children, if you are a parent.”

“While 9-5 and what happens on the job is important, what happens from 5-9, off the job, is infinitely more important.”

“Know more than other. Work more than other. Expect less than other”

“I am a true laborer: I earn that I eat, get that I wear, owe no man hate, envy no man's happiness, glad of other men's good, content with my harm.”

“A man who gets the reputation of rising at dawn can sleep to noon.”