The point is that we need this
hymn to restate and magnify our entire salvation history, to draw on Hannah's song in 1 Samuel, as well as on prophetic warnings
about the day
of the Lord as a time when all that we value will be called into
question.
However one
of the things I did for many many years, and still do often is right after a sermon, right after the final
hymn, I come down to the front
of church and say anyone who wants to come and ask
questions about the sermon or give me feedback, can do it.