In the armies and among every ten men there is one of more life, of more heart, or at least of more authority, who with his courage, with words and by example keeps the others firm and disposed to fight.
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.
....for friendships that are acquired by a price and not by greatness and nobility of character are purchased but are not owned, and at the proper moment they cannot be spent.
A wise prince will seek means by which his subjects will always and in every possible condition of things have need of his government, and then they will always be faithful to him.
Therefore, a prudent ruler ought not to keep faith when by so doing it would be against his interest, and when the reasons which made him bind himself no longer exist. If men were all good, this precept would not be a good one; but as they are bad, and would not observe their faith with you, so you are not bound to keep faith with them.
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.
For he who innovates will have for his enemies all those who are well off under the existing order of things, and only lukewarm supporters in those who might be better off under the new.