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?
How we live is so different from how we ought to live that he who studies what ought to be done rather than what is done will learn the way to his downfall rather than to his preservation.
It is necessary for him who lays out a state and arranges laws for it to presuppose that all men are evil and that they are always going to act according to the wickedness of their spirits whenever they have free scope.
And truly it is a very natural and ordinary thing to desire to acquire, and always, when men do it who can, they will be praised or not blamed; but when they cannot, and wish to do it anyway, here lies the error and the blame.
An armed republic submits less easily to the rule of one of its citizens than a republic armed by foreign forces. Rome and Sparta were for many centuries well armed and free. The Swiss are well armed and enjoy great freedom. Among other evils caused by being disarmed, it renders you contemptible. It is not reasonable to suppose that one who is armed will obey willingly one who is unarmed; or that any unarmed man will remain safe among armed servants.
I hold it to be a proof of great prudence for men to abstain from threats and insulting words toward anyone, for neither diminishes the strength of the enemy.
You must never believe that the enemy does not know how to conduct his own affairs. Indeed, if you want to be deceived less and want to bear less danger, the more the enemy is weak or the less the enemy is cautious, so much more must you esteem him.
By the delusions of seeming good the people are often misled to desire their own ruin; and they are frequently influenced by great hopes and brave promises.