As usual, John Piper is better at verbalizing an issue than I am.
His language is a little stronger than mine, too.
But I don't think it's out of line.
Luke 22:31-32 "Simon, Simon, behold, Satan demanded to have you that he might sift you like wheat, but I have prayed for you that your faith may not fail. And when you have turned again, strengthen your brothers."