How do we know Christ's humanity was necessary for our salvation?

The necessity of Christ's incarnation can be seen as integral to God’s redemptive plan. According to the sermon, God the Father’s eternal purpose involved sending His Son to become man, so that Jesus could effectively mediate for His people. By becoming incarnate, Christ was able to fulfill the promises of God, which included suffering and dying for His elect. This act of grace reveals the depth of God’s love, making it clear that nothing obligated Christ to come except His own will and desire to save.