I regret saying it. I am sitting here trying to figure out why I say things like that every now and then. I think it is a mixture of (sinful) audience titillation and (holy) scorn against my own flesh and against the devil, along with the desire to make the battle with Satan and my flesh feel gutsy and real and not middle-class pious. There is a significant difference between saying that God disciplines his children and saying that he “kicks our ass” (the phrase used at Passion)—the effect of the first can produce a yawn and leave students with no sense of how real I mean it. I think “He kicks our backside” would have sufficed. And even better might have been some concrete illustrations of the Lord's firm spanks.
If I wanted to take the time, and I felt more defensive than I do, I could probably go to the Bible and find language as offensive as that in the mouth of prophets, and even God when dealing with the grossness of evil. But I doubt that the moment in the breakout session called for something that extreme. Sometimes maybe. I hope the Lord turns it for good.
I think if I had it to do over, I would not say it. On the one hand, I don't like fanning the flames of those who think it is hip and cool to swear for Jesus. That, it seems to me, is immature. On the other hand, I want those hip people to listen to all I say and write, and I hope that the Lord may get a hold of them and draw them out of immaturity and into the fullness of holiness. But it backfires if one becomes unholy to make people holy. I suspect there was too much of the unholy in my heart at that moment.