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.
There are many who think a wise prince ought, when he has the chance, to foment astutely some enmity, so that by suppressing it he will augment his greatness.
And what physicians say about consumptive illnesses is applicable here: that at the beginning, such an illness is easy to cure but difficult to diagnose; but as time passes, not having been recognized or treated at the outset, it becomes easy to diagnose but difficult to cure.
Men must either be caressed or else destroyed.
These opportunities, then, gave these men the chance they needed, and their great abilities made them recognize it.
Without an opportunity, their abilities would have been wasted, and without their abilities, the opportunity would have arisen in vain.
Those who believe that where great personages are concerned new favors cause old injuries to be forgotten deceive themselves.
...no one should marvel at the ease with which Alexander [the Great] kept possession of Asia, or at the difficulties which others, like Pyrrhus and many more, had in preserving their conquests. The difference does not arise from the greater or lesser ability of the conqueror, but from dissimilarities in the conquered lands.
As a general thing anyone who is not your friend will advise neutrality while anyone who is your friend will ask you to join him, weapon in hand.
Wisdom consists of knowing how to distinguish the nature of trouble, and in choosing the lesser evil.
That defense alone is effectual, sure and durable which depends upon yourself and your own valour.
It is not titles that honour men, but men that honour titles.