A prince is also respected when he is a true friend and a true enemy; that is, when he declares himself on the side of one prince against another without any reservation.
Conquered states that have been accustomed to liberty and the government of their own laws can be held by the conqueror in three different ways. The first is to ruin them; the second, for the conqueror to go and reside there in person; and the third is to allow them to continue to live under their own laws, subject to a regular tribute, and to create in them a government of a few, who will keep the country friendly to the conqueror
To keep your actions and your plans secret always has been a very good thing . .. Marcus Crassus said to one who asked him when he was going to move the army: 'Do you believe that you will be the only one not to hear the trumpet?
Knowing how to fight made men more bold, because no one fears doing what it seems to him he has learned to do. Therefore, the ancients wanted their citizens to be trained in every warlike action.
War should be the only study of a prince. He should consider peace only as a breathing-time, which gives him leisure to contrive, and furnishes as ability to execute, military plans.
And if such malignity is hidden for a time, it proceeds from the unknown reason that would not be known because the experience of the contrary had not been seen, but time, which is said to be the father of every truth, will cause it to be discovered.
Whoever wishes to foresee the future must consult the past; for human events ever resemble those of preceding times. This arises from the fact that they are produced by men who ever have been, and ever shall be, animated by the same passions, and thus they necessarily have the same results.
It is the duty of a man of honor to teach others the good which he has not been able to do himself because of the malignity of the times, that this good finally can be done by another more loved in heaven.
It is a true observation of ancient writers, that as men are apt to be cast down by adversity, so they, are easily satiated with prosperity, and that joy and grief produce the same effects. For whenever men are not obliged by necessity to fight they fight from ambition, which is so powerful a passion in the human breast that however high we reach we are never satisfied.