“It is important to view knowledge as sort of a semantic tree -- make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there i...”

“I think its important to reason from first principles rather than by analogy. The normal way we conduct our lives is we reason by analogy. [With analogy] we are doing this because its like somethin...”

“I'm not trying to be anyone's savior. I just try to think about the future and not be sad”

“You need to live in a dome initially, but over time you could terraform Mars to look like Earth and eventually walk around outside without anything on... So it's a fixer-upper of a planet.”

“My proceeds from the PayPal acquisition were $180 million. I put $100 million in SpaceX, $70m in Tesla, and $10m in Solar City. I had to borrow money for rent.”

“Constantly seek criticism. A well thought out critique of whatever youre doing is as valuable as gold.”

“I possess the faculty of enjoying the company of those I - of my friends as well in silence as in conversation.”

“Because thou writest me often, I thank thee ... Never do I receive a letter from thee, but immediately we are together.”

“You can't be a good manager if you are doing everything yourself.”

“You need to live in a dome initially, but over time you could terraform Mars to look like Earth and eventually walk around outside without anything on... So it's a fixer-upper of a planet.”

“The one that will put the first human colony on another planet is certainly the most important human on Earth. And you can judge the rest of mankind of his time by how they judge him along the way.”

“You yourself, as much as anybody in the entire universe, deserve your love and affection”

“I read once that the ancient Egyptians had fifty words for sand & the Eskimos had a hundred words for snow. I wish I had a thousand words for love, but all that comes to mind is the way you move ag...”

“Romance is the glamour which turns the dust of everyday life into a golden haze. ”