You must know, then, that there are two methods of fighting, the one by law, the other by force: the first method is that of men, the second of beasts; but as the first method is often insufficient, one must have recourse to the second.

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?

One who deceives will always find those who allow themselves to be deceived.

There are three kinds of minds: first those that attain insight and understanding of things by their own means, then those that recognize what is right when others explain it to them, and finally those that are capable of neither one nor the other.

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.

(A ruler) cannot and should not keep his word when to do so would go against his interests or when the reason he pledged it no longer holds.

The prince who relies upon their words, without having otherwise provided for his security, is ruined; for friendships that are won by awards, and not by greatness and nobility of soul, although deserved, yet are not real, and cannot be depended upon in time of adversity.