I choose my friends for their good looks, my acquaintances for their good characters, and my enemies for their good intellects. A man cannot be too careful in the choice of his enemies.
Whether he likes it or not, [he] cannot remain incognito forever. He has outraged too many wise men and pleased too many fools to hide behind his too-appropriate order to assume leadership of the forces of stupidity he has marshalled, or his enemies will unmask him in order to better understand the disease that has produced such a warped and twisted mind.
One of the most lasting pleasures you can experience is the feeling that comes over you when you genuinely forgive an enemy - whether he knows it or not.
Those who by valorous ways become princes, like these men ['Moses, Cyrus, Romulus, Theseus, and such like'], acquire a principality with difficulty, but they keep it with ease. The difficulties they have in acquiring it rise in part from the new rules and methods which they are forced to introduce to establish their government and its security. And it ought to be remembered that there is nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success, then to take the lead in the introduction of a new order of things. Because the innovator has for enemies all those who have done well under the old conditions, and lukewarm defenders in those who may do well under the new. This coolness arises partly from fear of the opponents, who have the laws on their side, and partly from the incredulity of men, who do not readily believe in new things until they have had a long experience of them. Thus it happens that whenever those who are hostile have the opportunity to attack they do it like partisans, whilst the others defend lukewarmly, in such wise that the prince is endangered along with them.