The Human Nature of Christ was Necessary to his Mediatorial office
Source: TTT
1 Timothy 2:5
For there is one God, and there is one mediator between God and men, the man Christ Jesus,
Hebrews 2:17
For this reason He had to be made like His brothers in every way, so that He might become a merciful and faithful high priest in service to God, in order to make atonement for the sins of the people.
Galatians 4:4, 5
But when the time had fully come, God sent His Son, born of a woman, born under the law, / to redeem those under the law, that we might receive our adoption as sons.
1 Corinthians 15:21
For since death came through a man, the resurrection of the dead comes also through a man.
Romans 6:15, 19
What then? Shall we sin because we are not under law, but under grace? Certainly not! / I am speaking in human terms because of the weakness of your flesh. Just as you used to offer the parts of your body in slavery to impurity and to escalating wickedness, so now offer them in slavery to righteousness leading to holiness.