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Nothing made a happy slave, but a degraded man. In proportion as the mind grew callous to its degradation, and all sense of manly pride was lost, the slave felt comfort. In fact, he was no longer a man. If he were to define a man, he would say with Shakspeare, "Man is a being, holding large discourse, Looking before and after." A slave was incapable of either looking before or after.
— EDMUND BURKE