God commands we serve only Him. We serve Him with all we have and all we are, including the 90% of our income which does not go in the plates. What does it look like to serve God above money?
The reign of God in Christ compels us to pray for all in authority, while at the same time our praying for them calls into the question all the idolatries that arise from the exercise of this authority.
The LORD God declares He Himself will shepherd His sheep. He will seek them out. He will rescue them. He will save. He will gather them in. In other words, the Good Shepherd will take care of His own sheep.
The heart of your sermon is the promise that God, in Jesus, has sought and found each of us. He receives us sinners and invites us to eat with Him at His table.