Let him that is without stone among you cast the first thing he can lay his hands on.

I undertake the same project as Montaigne, but with an aim contrary to his own: for he wrote his Essays only for others, and I write my reveries only for myself.

SpaceX is only 12 years old now. Between now and 2040, the company's lifespan will have tripled. If we have linear improvement in technology, as opposed to logarithmic, then we should have a significant base on Mars, perhaps with thousands or tens of thousands of people.

Dad is a skilled athlete and runs his own football school for kids. While football is his entire life and he encouraged us to play, he still found time to take me to ballet and tennis lessons.

I think frugality drives innovation, just like other constraints do. One of the only ways to get out of a tight box is to invent your way out.