How do we know Christ's humanity is important for our salvation?

The humanity of Christ is fundamental to our understanding of salvation because He became our federal head. As a man, He was made to represent His people before God, fulfilling divine justice through His obedience and suffering. His human experiences—hunger, sorrow, temptation—afford Him the ability to empathize with our weaknesses. The author of Hebrews articulates that Christ took on flesh and blood to deliver us from the bondage of sin and death. He learned obedience through the things He suffered, which allows Him to be a merciful and faithful high priest for His people. His condescension and identification with humanity ensure that our salvation is rooted in a real mediator who satisfies both God's justice and our desperate need for grace.