Is it better to be loved or feared? - Niccolò Machiavelli

All the States and Governments by which men are or ever have been ruled, have been and are either Republics or Princedoms.

Just as artists who draw landscapes get down in the valley to study the mountains and go up to the mountains to look down on the valley, so one has to be a prince to get to know the character of a people and a man of the people to know the character of a prince.

The Romans never allowed a trouble spot to remain simply to avoid going to war over it, because they knew that wars don't just go away, they are only postponed to someone else's advantage. Therefore, they made war with Philip and Antiochus in Greece, in order not to have to fight them in Italy... They never went by that saying which you constantly hear from the wiseacres of our day, that time heals all things. They trusted rather their own character and prudence — knowing perfectly well that time contains the seeds of all things, good as well as bad.