Augustine on the binding of the devil

He (the devil) is tied up like a dog on a chain, and can only bite someone who, deathly sure of himself, goes near him. Wouldn’t you think a man a fool who let hiimself be bitten by a chained up dog?

He can only bite those who willingly let him. It is not by force, but by persuasion, that he harms: he asks for our consent, he does not drag it from us.

{Daily Readings with St. Augustine}