“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.”

“I am not bound to please thee with my answer.”

“Things are often spoke and seldom meant.”

“Honest plain words best pierce the ear of grief.”

“"Fair, kind, and true" is all my argument,"Fair, kind, and true" varying to other words;And in this change is my invention spent,Three themes in one, which wondrous scope affords.”

“Thou hast the most unsavoury similes.”

“You taught me language, and my profit on't / Is, I know how to curse”