A man ninety years old was asked to what he attributed his longevity. I reckon, he said, with a twinkle in his eye, it because most nights I went to bed and slept when I should have sat up and worried.

Amateurs hope, professionals work.

Books are men of higher stature; the only men that speak aloud for future times to hear.

We try to exile ourselves more and more from nature - not always consciously: We build houses; we dismiss nature; nature has to be outside, because we're inside. God forbid something like a cockroach comes inside, or some dust.

My views as an individual ought not to be confused with my views as a scientist - the minute you try to mingle God and science, you get into trouble. Metaphysics has its place, and science has its place; don't mix the two.

You desire that which exceeds my humble powers, but I trust in the compassion and mercy of the All-powerful God.

The momentum of my creative life and intellectual growth is still the momentum of breaking out of fundamentalism. Because of that, I'm very grateful for it. But I'm also grateful that at the center of it was something that I still believe to be true - those fundamentals of faith.