The Son giving Himself over to the Father so that the Father could fulfill His will.
Yes! I love singing songs that focus on what our Lord has accomplished through the cross. I'd argue that there's no greater way that He's demonstrated His love than through the cross. And no greater thing that can spark our worship of the Lord than the cross.
We Christians could ponder the cross for our entire life and still never exhaust the wonder of what the Creator has done through Jesus' work on the cross....