The cruel man is of misanthropic temperament, and is a man of moods, oscillating from quiet brooding to sudden explosions. If a man like this does no… - Frederick II of Prussia

Machiavel's The Prince is to ethics what the work of Spinoza is to faith. Spinoza sapped the fundamentals of faith, and drained the spirit of religion; Machiavel corrupted policy, and undertook to destroy the precepts of healthy morals: the errors of the first were only errors of speculation, but those of the other had a practical thrust. [...] I always have regarded The Prince as one of the most dangerous works which were spread in the world; it is a book which falls naturally into the hands of princes, and of those who have a taste for policy. [...] There is a real injustice in concluding that the rotten apples are representative of all of them.

Do you think I take any pleasure in this dog's life, in seeing and causing death in people unknown to me, in losing friends and acquaintances daily, in seeing my reputation ceaselessly exposed to the caprices of fortune, in spending the whole year with uneasiness and apprehension, in continually risking my life and my fortune? I certainly know the value of tranquility, the charms of society, the pleasures of life, and I like to be happy as much as anybody. Although I desire all these good things, I will not buy them with baseness and infamy. Philosophy teaches us to do our duty, to serve our country faithfully at the expense of our blood and of our repose, to commit our whole being to it.

Just as people are born, live a time, and die by diseases or old age, in the same way republics are formed, flower a few centuries, and perish finally by the audacity of a citizen, or by the weapons of their enemies. All has their period; all empires, and largest monarchies even, have only so much time: the republics feel continually that this time will arrive, and they look at any too-powerful family as the carriers of a disease which will give them the blow of death.