"I think a colony in space will take much longer than sci fiction writers think. It costs $10,000 to put a pound of anything into near earth orbit. That is your weight in gold. It costs about $100,000 a pound to put you on the moon. And it costs $1,000,000 a pound to put you on Mars."

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Whenever the early Christians entered a town the power structure got disturbed and immediately sought to convict them for being "disturbers of the peace" and "outside agitators." But they went on with the conviction that they were "a colony of heaven," and had to obey God rather than man. They were small in number but big in commitment. They were too God-intoxicated to be "astronomically intimidated." They brought an end to such ancient evils as infanticide and gladiatorial contest.

— Martin Luther King, Jr.