C.S. Lewis

“It is hard enough, even with the best will in the world, to be just. It is hard, under the pressure of haste, uneasiness, ill-temper, self-complacency, and conceit, even to continue intending justice. Power corrupts; the “insolence of office” will creep in. We see it so clearly in our superiors; is it unlikely that our inferiors see it in us? How many of those who have been over us did not sometimes (perhaps often) need our forgiveness? Be sure that we likewise need the forgiveness of those that are under us.”
… C. S. Lewis (1898-1963), “The Psalms”, in Christian Reflections, ed. Walter Hooper, Wm. B. Eerdmans Publishing, 1967, p. 119-120