Rascals, would you live forever? - Frederick II of Prussia

Hero demolished both his friends and his soldiers, who had helped him in the execution of his plans; he found new friends, and raised other troops. I say, in spite of Machiavel and of the ingrates, that this policy of Hero is very bad, and that it is much more prudent to trust the troops which have tested and known value, and have friends whose loyalty has also been tested. The new and unknown ones are also unsafe. I leave the reader to push this reasoning further; all those who detest ingratitude, and who truly value friendship, will not remain neutral on this matter.

If I had a province to punish, I would let it be governed by philosophers. Attributed in The Orthodox churchman's magazine; or, A Treasury of divine and useful knowledge (1803).

It is thus the justice (one would have to say) which must be the main responsibility of a sovereign. Since it is the prime interest of the many people whom they control, they must give it priority over any other interest of their own. What then becomes of Machiavel's recommendations of naked self-interest, self-aggrandizement, unleashed ambition and despotism? The sovereign, far from being the absolute Master of the people which are under his domination, is only the first servant.