In my sermon yesterday, the centerpiece of the message was that God's holiness and God's love intersect at the cross, for it is where God poured out his wrath against sin, satisfying his holiness, and it is where God poured out his love by putting Jesus, not us, on that cross. This way, as Paul writes in Romans 3:26, God is both "just and the one who justifies those who have faith in Jesus."
Another song I really like is the contemporary hymn In Christ Alone. I think only a few corrections are in order for this song, and one of them would be to change the line "'til on the cross as Jesus died, the wrath of God was satisfied" to "'til on the cross as Jesus died, God's wrath and love were satisfied." It wasn't just wrath poured out that day. "This is how we know what love is: Jesus Christ laid down his life for us." Indeed, "This is love: not that we loved God, but that he loved us and sent his Son as an atoning sacrifice for our sins" (1 Jn. 3:16; 4:10).