To allow mystery, which is to say to yourself, 'There could be more...things we don't understand,' is not to damn knowledge....It is to permit yourself an extraordinary, freedom: someone else does not have to be wrong in order that you might be right...This tolerance for mystery invigorates the imagination; and it is the imagination that gives shape to the universe.

The cold view to take of our future is that we are therefore headed for extinction in a universe of impersonal chemical, physical, and biological laws. A more productive, certainly more engaging view, is that we have the intelligence to grasp what is happening, the composure not to be intimidated by its complexity, and the courage to take steps that may bear no fruit in our lifetimes.

One must live in the middle of contradiction, because if all contradiction were eliminated at once life would collapse.

One of the great dreams of man must be to find some place between the extremes of nature and civilization where it is possible to live without regret.

To allow mystery, which is to say to yourself, 'There could be more...things we don't understand,' is not to damn knowledge....It is to permit yourself an extraordinary, freedom: someone else does not have to be wrong in order that you might be right...This tolerance for mystery invigorates the imagination; and it is the imagination that gives shape to the universe.

Conversations are efforts toward good relations. They are an elementary form of reciprocity. They are the exercise of our love for each other. They are the enemies of our loneliness, our doubt, our anxiety, our tendencies to abdicate. To continue to be in good conversation over our enormous and terrifying problems is to be calling out to each other in the night. If we attend with imagination and devotion to our conversations, we will find what we need; and someone among us will act—it does not matter whom—and we will survive.

I lay there knowing something eerie ties us to the world of animals. Sometimes the animals pull you backward into it. You share hunger and fear with them like salt in blood.