“I think immortality is a perfectly reasonable goal, and it’s hard to think of a more important one. I have hundreds of years of work to do right now, and I’m sure that if I got the chance to do that, I’d have thousand of years of work to do after that. So it’s very frustrating to have done as much as I’ve had and have this foolish reason to stop. [The foolish reason being] that I have evolved from creatures that don’t live long enough. [S]ome tortoises live longer than people. Why should we be satisfied with what we’ve got?”