If I were a young man, I would not hesitate at writing anything to get into print, except pornography.

I thought that perhaps the most creative mix for a society would be nine parts solid worker from institutions like MIT to one part poet from Marrakech, but in spite of the fact that I myself had been trained to be one of the solid workers, which meant that all of my sympathies lay with that group, I would not surrender the poet. The problem was to find him.

If your book doesn't keep you up nights when you are writing it, it won't keep anyone up nights reading it.

The extreme geniality of San Francisco's economic, intellectual and political climate makes it the most varied and challenging city in the United States.

It is difficult to be king when the gods are changing.

We should be most careful about retreating from the specific challenge of our age. We should be reluctant to turn our back upon the frontier of this epoch... We cannot be indifferent to space, because the grand slow march of our intelligence has brought us, in our generation, to a point from which we can explore and understand and utilize it. To turn back now would be to deny our history, our capabilities.

It heartens me to think of Verdi who composed thundering operas in his eighties; Michelangelo who did fine work in his ninetieth year, and Titian, who painted better than ever in his one hundredth.