"Skepticism, as I said, is not intellectual only; it is moral also; a chronic atrophy and disease of the whole soul. A man lives by believing something; not by debating and arguing about many things. A sad case for him when all that he can manage to believe is something he can button in his pocket, and with one or the other organ eat and digest! Lower than that he will not get."

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The way in which men cling to old institutions after the life has departed out of them, and out of themselves, reminds me of those monkeys which cling by their tails - aye, whose tails contract about the limbs, even the dead limbs, of the forest, and they hang suspended beyond the hunter's reach long after they are dead. It is of no use to argue with such men. They have not an apprehensive intellect, but merely, as it were a prehensile tail.

— Henry David Thoreau