Iteration, like friction, is likely to generate heat instead of progress.
O, thou hast damnable iteration, and art, indeed, able to corrupt a saint.
Thou hast done much harm upon me, Hal; God forgive thee for it! Before I knew thee, Hal, I knew nothing; and now am I, if a man should speak truly, little better than one of the wicked. I must give over this life, and I will give it over; by the Lord, an I do not, I am a villain: I'll be damn'd for never a king's son in Christendom.