It is easier to become entangled with an enemy than to disentangle oneself afterwards.
If we really want something done, it is best to do it ourselves.
Injuries may be forgiven, but not forgotten.
I thought these grapes were ripe, but I see now they are quite sour.
A person's true nature will reveal itself despite disguise.
A doubtful friend is worse than a certain enemy. Let a man be one thing or the other, and we then know how to meet him.