You could conceive spirituality as the study of the immeasurable, of the qualitative. But that's very different from the way we typically use the word. A spiritual person, in the popular conception, is somebody who's kind of aloof from the world, introspective, meditating, communing with non-material beings. That's the spiritual realm, and we elevate it above the material realm. What's more worthy, what's more admirable? Who's the one who has done this hard work on the self, and has done a lot of "practice"? That's the spiritual person.

An economist says that essentially more for you is less for me, but the lover knows that more for you is more for me, too.

The cynic thinks that he is being practical and that the hopeful person is not. It is actually the other way around. Cynicism is paralyzing, while the naïve person tries what the cynic says is impossible and sometimes succeeds.

Joint consumption doesn't create intimacy.

I think people become environmentalists through experiences of beauty and grief. There was that pond that you visited when you were a child, and there were frogs and turtles. You go back there and it's dead now. The forest you went to, now there are bulldozers, now it's a strip mall. These experiences of beauty followed by grief affect us more than learning that CO2 levels are now 400 parts per million.

Real change doesn't come without crisis. Childbirth doesn't come without crisis. I think that's happening with humanity now. Our growth has generated multiple crises...and these are the contractions that are propelling us into a new world, whether we like it or not, but I think we're going to like it.

True discipline is really just self-remembering; no forcing or fighting is necessary.