A man who was completely innocent, offered himself as a sacrifice for the good of others, including his enemies, and became the ransom of the world. It was a perfect act.
None of these men were enervated by wealth or hesitated to resign the pleasures of life; none of them put off the evil day in the hope, natural to poverty, that a man, though poor, may one day become rich. But, deeming that the punishment of their enemies was sweeter than any of these things, […]
To arrive at perfection, a man should have very sincere friends or inveterate enemies; because he would be made sensible of his good or ill conduct, either by the censures of the one or the admonitions of the other.
This is no time to make new enemies. (When asked on his deathbed to forswear Satan)
Agreement makes us soft and complacent; disagreement brings out our strength. Our real enemies are the people who makes us feel good so that we are slowly but inexorably pulled down into the quicksand of smugness and self-satisfaction.