Homiletically, there are two paths you can go by:
law, then gospel, then more law,
law, then gospel, and nothing more.
The first path is common, easy, and well-worn. The reasons are many, one being that we’re not yet comfortable with the space that grace brings, so we feel the urgency to fill that space with more things to do, more law.
The second path is uncommon, difficult, and overgrown. This risk of this path is known, but a worthwhile risk it is.
This is why communion follows the sermon, with its weekly utterance of all that God has done for the world through Christ. If the sermon fails to do this, the eucharistic liturgy re-centers the room.
They may ask, “Now what?”
You are safe to say, “Nothing.”
I do not nullify the grace of God, for if righteousness comes through the law, then Christ died for nothing.Galatians 2:21