I cannot affirm God if I fail to affirm man. Therefore, I affirm both. Without a belief in human unity I am hungry and incomplete. Human unity is the fulfillment of diversity. It is the harmony of opposites. It is a many-stranded texture, with color and depth.

The message from the moon which we have flashed to the far corners of this planet is that no problem need any longer be considered insoluble.

You are younger today than you will ever be again. Make use of it for the sake of tomorrow.

The main trouble with despair is that it is self-fulfilling. People who fear the worst tend to invite it. Heads that are down can't scan the horizon for new openings. Bursts of energy do not spring from a spirit of defeat. Ultimately, helplessness leads to hopelessness.

At a Dodger baseball game in Los Angeles, I asked Will Durant if he was ninety-four or ninety-five. "Ninety-four," he said. "You don't think I'd be doing anything as foolish as this if I were ninety-five, do you?"

History is an accumulation of error.

For every low there is an equal but opposite high.