At the end of the 19th century two French writers went to visit the well-known French scientist, Pierre Berthelot. Berthelot was a kind of scientific prophet. He forecast some of the weapons of mass destruction which would appear in the next century.

He said to the writers, “We have only begun to list the alphabet of destruction.”

Silence fell over the meeting. Then the elder of the two writers said quietly, “I think before that time comes, God will come like a great gatekeeper with his keys dangling at his waist and say, ‘Gentlemen, it’s closing time.’”

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