"You are a people holy to Jehovah, your God," Deuteronomy 7:6.
Holy. Set aside, exclusive for a specific purpose. A people for a divine will. God chose this particular people distinct from out of all other peoples on earth. God chose this people as his very own separate possession. As his treasure. Why? Not because they had so much to offer. (They had nothing.) Not because they deserved it. (They didn't.) Not because they were righteous. (They weren't.) So, why? Just because. Just because God loves you. Because God remains ever true to his promises. Because God stands faithful through a thousand lifetimes. Because Jehovah God is God. And none that trusts in him will be put to shame. Why not? Because the Lord Jesus is not ashamed to call them brothers.
We meet today with a brother or sister, qualified by our common confession: Jesus is Lord. And, together, he has joined us into that fellowship of praise enthroning our God.