To test a perfect theory with imperfect instruments did not impress the Greek philosophers as a valid way to gain knowledge.

It seems to me that God is a convenient invention of the human mind

Scientific truth is beyond loyalty and disloyalty.

The further a device is removed from human control, the more authentically mechanical it seems, and the whole trend in technology has been to devise machines that are less and less under direct human control and more and more under their own apparent will.

Fifty years," I hackneyed, "is a long time." "Not when you're looking back at them," she said. "You wonder how they vanished so quickly.

Uncertainty that comes from knowledge (knowing what you don't know) is different from uncertainty coming from ignorance.

The final end of Eternity, and the beginning of Infinity