....for friendships that are acquired by a price and not by greatness and nobility of character are purchased but are not owned, and at the proper moment they cannot be spent.
Niccolo MachiavelliAnd here one must not that hatred is acquired just as much by means of good actions as by bad ones; and so, as I said above, if a prince wishes to maintain the state, he is often obliged not to be good; because whenever that group which you believe you need to support you is corrupted, whether it be the common people, the soldiers, or the nobles, it is to your advantage to follow their inclinations in order to satisfy them; and then good actions are your enemy.
Niccolo Machiavelli