The Prince by Niccolo Machiavelli Chapter 3 Page 21

and of Spain in Italy has been brought about by France, and that the ruin of France has been wrought by them. Whence we may draw the general axiom, which never or rarely errs, that he who is the cause of another’s greatness is himself undone, since he must work either by address or force, each of which excites distrust in the person raised to power.