"If you let a single ray of light through the shutter, it will go on diffusing itself without limit till it enlighten the world; but the shadow that was never so wide at first, as rapidly contracts till it comes to naught. [...]
"There is no ill which may not be dissipated like the dark, if you let in a stronger light upon it. Overcome evil with good. Practice no such narrow economy as they, whose bravery amounts to no more light than a farthing candle, before which most objects cast a shadow wider than themselves."
-- Henry David Thoreau (b. 1817-07-12, d. 1862-05-06), "The Service", 1840