Machiavelli is right: one always must live with one's friends with the idea that they may turn into one's enemies. He should have said, with everyone.
Champagne! In victory, one deserves it; in defeat one needs it.
My enemies make appointments at my tomb.
Those who failed to oppose me, who readily agreed with me and accepted all my views, were those who did me the most injury.
It would be a joke if the conduct of the victor had to be justified to the vanquished.