Plutarch says very finely that a man should not allow himself to hate even his enemies.
Joseph Addison, Sir Richard Steele, Robert Bisset (1794). “The Spectator, with Illustrative Notes: To which are Prefixed, the Lives of Authors : Comprehending, Addison, Steele, Parnell, Hughes, Buegel, Eusden, Tickell, and Pope : with Critical Remarks about Their Writings”, p.20