Read this passage from chapter 22 of The Prince. But to enable a prince to form an opinion of his servant there is one test which never fails; when you see the servant thinking more of his own interests than of yours, and seeking inwardly his own profit in everything, such a man will never make a good servant, nor will you ever be able to trust him; because he who has the state of another in his hands ought never to think of himself, but always of his prince, and never pay any attention to matters in which the prince is not concerned.

On the other hand, to keep his servant honest the prince ought to study him, honouring him, enriching him, doing him kindnesses, sharing with him the honours and cares; and at the same time let him see that he cannot stand alone, so that many honours may not make him desire more, many riches make him wish for more, and that many cares may make him dread chances. When, therefore, servants, and princes towards servants, are thus disposed, they can trust each other, but when it is otherwise, the end will always be disastrous for either one or the other.

What is Machiavelli’s primary purpose in writing this passage?