There was an ancient tradition, probably coming over from the synagogues, where visitors would share news of what was taking place in the church where they were from. Maybe the salutation (“The Lord be with you”) at the start of the service is the ritual placeholder for that. We welcome you, please share. To which the response would have been to share and end with “and also with you”. The welcome has been given and accepted. This sermon is a bit like that. When you read something that is so profound it humbles you, you really need to share it. I could not come up with a better illustration of “a city on a hill” than the response of this pastor from Wuhan.
The lectionary continues reading through the sermon on the mount. For me the best way to read it is as what it was to the early church, a catechism on the Christian life. In these verses Jesus addresses a couple of questions. The first is a rare instance of a why question being answered by God. The second is what is the relationship between the messianic Kingdom and the old covenant contained in the law and prophets? The two answers feed into each other. As it turns out the old covenant maintains an honored role. This homily explores those answers and the role of the law in the life of the Christian.
Worship note: The Hymn of the Day supporting that theme is LSB 579, The Law of God is Good and Wise. It is a great example of a Lutheran Catechetical hymn. It teaches the three uses of the law, the important powerlessness of that law, and as with the Gospel text the fulfillment of that good and wise law. The law has become something of a four letter word in many churches. The more you read both Jesus himself and the church from different ages you realize how wrong that is.