For an instance of such a stance, see John 19:25. For exhortation and proclamation of its benefits see Philippians 3:7-11 and Hebrews 12:1-3.
This song reflects the narrative of the suffering and death of Christ on Calvary, events whose significance and purpose is deepened by the confessions of the church. Heidelberg Catechism, Lord’s Days 15-16, Questions and Answers 37-44 explain the significance of each step of his suffering. Question and Answer 40 testifies that Christ had to suffer death “because God’s justice and truth require it; nothing else could pay for our sins except the death of the son of God.”
The Belgic Confession, Article 20 professes that “God made known his justice toward his Son…poured out his goodness and mercy on us…giving to us his Son to die, by a most perfect love, and raising him to life for our justification, in order that by him we might have immortality and eternal life.”
Consider also the testimony of Belgic Confession, Article 21: “He endured all this for the forgiveness of our sins.”