If Jesus Christ was part of the Trinity of God, how could He die?The answer is that He was not just God, He was also man. He possessed both divine nature and human nature, a characteristic called hypostatic union.
Colossians 2:9 tells us, “For in Christ all the fullness of the Deity lives in bodily form”. We also know that Jesus was flesh because the Bible shows us that He was born of a virgin, He eats, sleeps, and gets tempted.
Being both God and man, we know that while His body could be killed on the cross, his Spirit could not. 1 Peter 3:18 states, “He was put to death in the body, but made alive in the Spirit”. If Jesus was not man, He could not die for mankind, but if He was not God, He would not have been a holy enough sacrifice.