here is a great tip from Dave Black:
March 10, 2013 8:12 AM When preachers use Greek from the pulpit, should someone be required to interpret (see 1 Cor. 14:26-32)? A preacher, for example, might etymologize. “The Greek word here [name the word] is composed of two roots [name them in Greek], the first meaning ____ and the second meaning ____; hence the word means ______.” The problem is that these definitions often do not comport with actual New Testament usage. The preacher has committed the root fallacy, exposed so long ago by Don Carson and others (including moi). Here’s the problem: Who in the congregation is able to check the accuracy of remarks like that? This is where Paul’s teaching about tongues in 1 Corinthians might have an application. You will recall that Paul requires the one who speaks in a tongue to provide an interpretation at the same time. Or else someone else would have to be present who could show the value (or non-value) of its worth for the edification of the Body. In this way Paul sought to rob the tongues-speaker of the subterfuge and mystery inherent in “unknown tongues” without discouraging initiative of the right kind.
Maybe this is a good reason to always have a Q & A session after we preach/teach. I’m told that even the Golden-Mouthed orator Chrysostom allowed questions during his sermons.
Just a thought.