Our Lord Jesus, the Ever Living, the Immortal, the Eternal, became man, "and being found in the fashion as a man, he humbled himself, and [died] …the death of the cross"(Phil 2:8)
That death was not on His own account. His humanity had no need to die. He might have lived on and have seen no death, if He had so willed. He had committed no offense, no sin, and, therefore, no punishment could fall upon Him.
Every pang upon the cross was substitutionary; for you, the sons of men, the Prince of Glory bled, "the just for the unjust, that he might bring us to God" (1 Peter 3:18).
Taken from the book God Loves You by Charles Spurgeon 1834-1892