The word natural is here important. This result can be obliterated by grace, suppressed by prudence or social convention, and (which is dangerous) wholly disguised by self-deception. But just as the natural result of throwing a lighted match into a pile of shavings is to produce a fire—though damp or the intervention of some more sensible person may prevent it—so the natural result of cheating a man, or ‘keeping him down’, or neglecting him, is to arouse resentment; that is, to impose upon him the temptation of becoming what the Psalmists were when they wrote the vindictive passages.

