As Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up: that whosoever believeth in him should not perish, but have eternal life. John 3:14, 15.
The lifting up of the brazen serpent [Num. 21: 4- 9] was to teach Israel an important lesson. They could not save themselves from the fatal effect of the poison in their wounds. God alone was able to heal them. Yet they were required to show their faith in the provision which He had made. They must look in order to live. It was their faith that was acceptable with God, and by looking upon the serpent their faith was shown. They knew that there was no virtue in the serpent itself, but it was a symbol of Christ; and the necessity of faith in His merits was thus presented to their minds. Heretofore many had brought their offerings to God, and had felt that in so doing they made ample atonement for their sins. They did not rely upon the Redeemer to come, of whom these offerings were only a type. The Lord would now teach them that their sacrifices, in themselves, had no more power or virtue than the serpent of brass, but were, like that, to lead their minds to Christ, the great sin offering. . . .
The Israelites saved their lives by looking upon the uplifted serpent. That look implied faith. They lived because they believed God’s word, and trusted in the means provided for their recovery. So the sinner may look to Christ, and live. He receives pardon through faith in the atoning sacrifice. Unlike the inert and lifeless symbol, Christ has power and virtue in Himself to heal the repenting sinner.
While the sinner cannot save himself, he still has something to do to secure salvation. “Him that cometh to me,” says Christ, “I will in no wise cast out” (John 6: 37). But we must come to Him; and when we repent of our sins, we must believe that He accepts and pardons us. Faith is the gift of God, but the power to exercise it is ours. Faith is the hand by which the soul takes hold upon the divine offers of grace and mercy. . . .
Jesus had pledged His word; He will save all who come unto Him. Though millions who need it to be healed will reject His offered mercy, not one who trusts in His merits will be left to perish.
From God’s Amazing Grace – Page 314