Because you have seen something doesn't mean you can explain it. Differing interpretations will always abound, even when good minds come to bear. The kernel of indisputable information is a dot in space; interpretations grow out of the desire to make this point a line, to give it direction. The directions in which it can be sent, the uses to which it can be put by a culturally, professionally, and geographically diverse society are almost without limit. The possibilities make good scientists chary.

It does not demean men to want to be what they imagine the wolf to be, but it does demean them to kill the animal for it.

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.

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.

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.

If there is a stage at which an individual life becomes truly adult, it must be when one grasps the irony in its unfolding and accepts responsibility for a life lived in the midst of such paradox.

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.