Parenthood remains the greatest single preserve of the amateur.

The Law of Raspberry Jam: the wider any culture is spread, the thinner it gets.

If we do not learn from history, we shall be compelled to relive it. True. But if we do not change the future, we shall be compelled to endure it. And that could be worse.

The next major explosion is going to be when genetics and computers come together.

Each new machine or technique, in a sense, changes all existing machines and techniques, by permitting us to put them together into new combinations. The number of possible combinations rises exponentially as the number of new machines or techniques rises arithmetically. Indeed, each new combination may, itself, be regarded as a new super-machine.

The recognition that no knowledge can be complete, no metaphor entire, is itself humanizing. It counteracts fanaticism. It grants even to adversaries the possibility of partial truth, and to oneself the possibility of error.

It is better to err on the side of daring than the side of caution.