It's said that power corrupts, but actually it's more true that power attracts the corruptible. The sane are usually attracted by other things than power. When they do act, they think of it as service, which has limits. The tyrant, though, seeks mastery, for which he is insatiable, implacable.
Bio: Dorothy Gladys "Dodie" Smith was an English children's novelist and playwright, known best for the novel The Hundred and One Dalmatians. Other works include I Capture the Castle, and The Starlight Barking.