This sermon by Rev. Kevin DeYoung is from Matthew 7:28-29, part of the Sermon on the Mount. He focuses in on what astonished the hearers of that sermon: Christ’s authority. What better subject to listen to at the start of a new year?
This is an important message because DeYoung points out a common misconception about the Sermon on the Mount (that is just a nice ethics lesson). I highly recommend it.