“In doing it, pays itself”AllusionAct 1,Scene 4Lines 22-23An explanation of Macbeth’s use of proverb in Act 1, Scene 4 of myShakespeare’s Macbeth. Macbeth The service and the loyalty I owe, In doing it, pays itself. When Macbeth tells Duncan, “The service and loyalty I owe, in doing it, pays itself,” he’s riffing on the proverb, “Virtue is its own reward.”