Habit (n.) is, as it were, a second nature.
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Habit (n.) teaches us to bear fatigue and to despise wounds and pain.
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Habit (n.) is so strong that we like the places where we have lived longest, even when they are mountainous and covered with forest.
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Habit (n.) dims wonder: brought suddenly from endless darkness we would find the heavens beautiful, but our eyes are used to them — as if novelty, not importance, should move us to ask about causes.