Every live thing is a survivor on a kind of extended emergency bivouac.

For all the insularity of the old guard, Pittsburgh was always an open and democratic town.

Divinity is not playful. The universe was not made in jest but in solemn incomprehensibl e earnest. By a power that is unfathomably secret, and holy, and fleet. There is nothing to be done about it, but ignore it, or see.

Nature seems to exult in abounding radicality, extremism, anarchy. If we were to judge nature by its common sense or likelihood, we wouldn't believe the world existed. In nature, improbabilities are the one stock in trade. The whole creation is one lunatic fringe. ... No claims of any and all revelations could be so far-fetched as a single giraffe.

You have to take pains in a memoir not to hang on the reader's arm, like a drunk, and say, 'And then I did this and it was so interesting.

What have we been doing all these centuries but trying to call God back to the mountain, or, failing that, raise a peep out of anything that isn't us? What is the difference between a cathedral and a physics lab? Are not they both saying: Hello? We spy on whales and on interstellar radio objects; we starve ourselves and pray till we're blue.

Those of us who read carried around with us like martyrs a secret knowledge, a secret joy, and a secret hope: There is a life worth living where history is still taking place; there are ideas worth dying for, and circumstances where courage is still prized.