" Oh! if, when we oppress and grind our fellow-creatures, we bestowed but one thought on the dark evidences of human error, which, like dense and heavy clouds, are rising, slowly it is true, but not less surely, to Heaven, to pour their after-vengeance on our heads; if we heard but one instant, in imagination, the deep testimony of the dead men's voices, which no power can stifle, and no pride shut out; where would be the injury and injustice: the suffering, misery, cruelty, and wrong: that each day's life brings with it! "

― Charles Dickens , Oliver Twist