Job understood our need for a Heavenly Mediator. Long before Christ arrived in Bethlehem, this godly man testified to the purpose of Jesus' coming.
God Himself said of Job that "there is none like him in the earth, a perfect and an upright man, one who fears God, and turns away from evil." Yet even Job was incapable of defending himself before God's standard of perfection. Job knew that he needed a mediator.
Mediating is what Jesus came for - it was the purpose of His mission. His sacrificial atonement made our forgiveness possible, and in choosing us to be part of His church -- His bride -- He has deeded to us everything He possesses.
When He took on human form to walk among us as a man, it wasn't just a temporary change of disguise. Jesus, the God-Man, was the first fruit of human resurrection. He ascended to Heaven as a man, and He will return as a man to judge the earth. Jesus -- God in the flesh -- will be a man for all eternity.
It is the depth of His incredible love for fallen humanity that makes His mediation possible. He didn't just decree forgiveness -- that wouldn't be justice. He took our place as a human man and bore the punishment we deserve. He can make the most irrefutable argument in our defense -- 'This one's sins have already been punished -- his debt has been paid.'
For we do not have a High Priest unable to sympathize with our weaknesses, but One tempted in all things in like manner, yet without sin... ~ Hebrews 4:15
And so Jesus also suffered outside the city gate to make the people holy through his own blood. Let us, then, go to him outside the camp, bearing the disgrace he bore. ~ Hebrews 13:12-13
For there is one God, and one mediator between God and men, the man Christ Jesus... ~ 1 Timothy 2:5