The loss of seriousness seems to me to be, in effect, a loss of hope. I think that the thing that made people rise to real ambition, real gravity was the sense of posterity, for example - a word that I can remember hearing quite often when I was a child and I never hear anymore. People actually wanted to make the world good for people in generations that they would never see. It makes people think in very large terms to try to liberate women, for example, or to try to eliminate slavery.

A little too much anger, too often or at the wrong time, can destroy more than you would ever imagine.

I'm really disturbed by the degree to which I don't hear people saying, "Are we leaving the world better than we found it?" I think we are a generation that perhaps could not answer in the affirmative, and it is the evasion of the larger responsibility of being only one generation in what one hopes will be an infinite series of fruitful generations. There is a selfishness in refusing to understand that we are passing through; others will come, and they deserve certain courtesies and certain considerations from us.

The loss of seriousness seems to me to be, in effect, a loss of hope. I think that the thing that made people rise to real ambition, real gravity was the sense of posterity, for example - a word that I can remember hearing quite often when I was a child and I never hear anymore. People actually wanted to make the world good for people in generations that they would never see. It makes people think in very large terms to try to liberate women, for example, or to try to eliminate slavery.

Oddly enough, my favorite genre is not fiction. I'm attracted by primary sources that are relevant to historical questions of interest to me, by famous old books on philosophy or theology that I want to see with my own eyes, by essays on contemporary science, by the literatures of antiquity.

Many times when I stop working on a problem consciously, my mind continues to work on it below the surface. Often solutions come on me quite by surprise. I've learned over time to allow that to happen, rather than to feel that I can simply solve the problem by continuous, grueling effort.

Generosity is also an act of freedom, a casting off of the constraints of prudence and self-interest.