Verträge bricht man um des Nutzens willen.

Keep your friends close, keep your enemies closer.

… to a Prince who wants to do great things, it is necessary to learn to deceive.

It is necessary for a prince wishing to hold his own to know how to do wrong, and to make use of it or not according to necessity.

It is of the greatest important in this world that a man should know himself, and the measure of his own strength and means; and he who knows that he has not a genius for fighting must learn how to govern by the arts of peace.

Considering thus how much honor is awarded to antiquity, and how many times—letting pass infinite other examples—a fragment of an ancient statue has been bought at high price because someone wants to have it near oneself, to honor his house with it, and to be able to have it imitated by those who delight in that art, and how the latter then strive with all industry to represent it in all their works; and seeing, on the other hand, that the most virtuous works the histories show us, which have been done by ancient kingdoms and republics, by kings, captains, citizens, legislators, and others who have labored for their fatherland, are rather admired than imitated—indeed they are so much shunned by everyone in every least thing that no sign of that ancient virtue remains with us—I can do no other than marvel and grieve… From this it arises that the infinite number who read [the histories] take pleasure in hearing of the variety of accidents contained within them without thinking of imitating them, judging that imitation is not only difficult but impossible—as if heaven, sun, elements, men had varied in motion, order, and power from what they were in antiquity. Wishing, therefore, to turn men from this error, I have judged it necessary to write on all those books of Titus Livy...