Human knowledge is never entirely consistent or complete, because the human brain is only a crude and transient mass of watery cells, error-prone and… - Jack Williamson

He was a strong man in wise enough to realize that beyond power itself is the power of using it wisely.

“I wonder—?” whispered April Bell, her long eyes narrowed and dark. “I wonder what they really found?”
“Whatever it is,” breathed Barbee, “the find doesn’t seem to have made them very happy. A fundamentalist might think they had stumbled into hell.”
“No,” the girl said, “men aren’t that much afraid of hell.”

The criticism of SF has tapped rich new vines for researchers, and I can think of writers who seem to be trying harder to impress the critics than to please their readers. I’m afraid the critical tail has begun to wag the creative dog.