Why was it necessary for Christ to humble Himself even unto death?

Because of the justice and truth of God satisfaction for our sins could be made in no other way than by the death of the Son of God.

Proofs

• Because of the justice and truth of God (Genesis 2:17)
• satisfaction for our sins could be made in no other way than by the death of the Son of God. (Romans 8:3; Philippians 2:8; Hebrews 2:9; Hebrews 2:14–15)