"An instinct is a blind tendency to some mode of action, independent of any consideration, on the part of the agent, of the end to which the action leads."

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No doubt hard work is a great police agent. If everybody were worked from morning till night, and then carefully locked up, the register of crime might be greatly diminished. But what would become of human nature? Where would be the room for growth in such a system of things? It is through sorrow and mirth, plenty and need, a variety of passions, circumstances, and temptations, even through sin and misery, that men's natures are developed.

— Arthur Helps