Why is it necessary for Jesus to be both God and man?

Jesus being both God and man is crucial. As God, He possesses the holiness and authority to approach the Father; as man, He can represent humanity and bear the weight of our sins. Hebrews 8:1-2 emphasizes that He is seated at God's right hand, indicating His divine authority while also being fully human in His life on earth. This unique combination enables Him to bridge the gap caused by sin, offering a perfect solution to our estrangement from God. The eternal High Priest represents us before the Father, advocating based on His own sacrifice.