Everyone loves a hero. What we differ on is the question of who the heroes are, because we differ over what matters. And who matters is a function of what matters. [If] what matters is intelligence, the people who matter are the intelligent, and the people who matter the most, the heroes, are the geniuses.

When the first people started to argue against slavery, for example, this was a new idea. If you crowd-source, you'd never come up with this. And so the - exactly the kind of progress we've made couldn't be made if we depend it on crowd-sourcing.

When we call a philosopher distinguished, we are not saying that she is worthy and not saying that she is recognized, but we are saying that she occupies the intersection of both - that she is recognized and worthy; even that she is recognized because she's worthy.

So Socrates was a kind of gadfly. He was a sort of philosophical urban gorilla hanging around in the middle of Athens, asking these peculiar questions of everybody - important people, young men, slaves - questions that had to do with ultimately what's the life that's worth living. And Plato was one of the young men who hung around him, a very aristocratic young man, came from a very old, important family.

And what is it, according to Plato, that philosophy is supposed to do? Nothing less than to render violence to our sense of ourselves and our world, our sense of ourselves in the world.

We need science. We need empirical evidence. We can't just use mathematical reasoning to deduce the nature of the world.

The philosophers talk across the centuries exclusively to one another, hermetically sealed from any influences derived from non-philosophical discourse.