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With every exertion, the best of men can do but a moderate amount of good; but it seems in the power of the most contemptible individual to do incalculable mischief.

Washington Irving (1859). “The works of Washington Irving”, p.402
With every exertion, the best of men can do but a moderate amount of good; but it seems in the power of the most contemptible individual to do incalculable mischief.