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.
War is just when it is necessary arms are permissible when there is no hope except in arms.
There is nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success, than to take the lead in the introduction of a new order of things.
Princes and governments are far more dangerous than other elements within society.
There is no surer sign of decay in a country than to see the rites of religion held in contempt.
Nature that framed us of four elements, warring within our breasts for regiment, doth teach us all to have aspiring minds.
To understand the nature of the people one must be a prince, and to understand the nature of the prince, one must be of the people.