"Normally, if someone's legacy will outlast their life, it's apparent when they die. On the day when Alexander the Great, or Caesar Augustus, or Napoleon, or Socrates, or Muhammad died, their reputations were immense. When Jesus died, his tiny, failed movement appeared clearly at an end."

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Around the time of the Terran Caesar Augustus, a Martian artist had been composing a work of art. It could have been called a poem, a musical opus, or a philosophical treatise; it was a series of emotions arranged in tragic, logical necessity. Since it could be experienced by a human only in the sense in which a man blind from birth might have a sunset explained to him, it does not matter which category it be assigned.

— Robert A. Heinlein