IV. THE NECESSITY OF CHRIST'S DEATH.
The necessity of the atonement lay in a twofold fact: The holiness of God, and the sinfulness of man. The doctrine of the atonement is a related subject, and it cannot be properly understood unless it is viewed as such. It is related to certain conditions existing between God and man—a condition and relation which has been affected by sin. It is necessary, therefore, to know this relation and how it has been affected by sin. This relation between God and man is a personal one. No other construction can legitimately be put upon the passages setting forth this relationship. "Thou has searched me, and known me." "I am continually with Thee." It is, moreover, an ethical relationship, and that which is ethical is at the same time personal and universal, that is to say, that God's dealings with mankind are expressed in a moral constitution of universal and eternal validity. These relationships are disordered by sin. No matter how sin came to be here we are morally conscious, by the testimony of a bad conscience, that we are guilty, and that our sin is not merely a matter of personal guilt but a violation of a universal moral law.
1. THE HOLINESS OF GOD.
We should carefully note the emphasis laid upon the doctrine of God's holiness in the Old Testament (see under Attributes of God, p. 37). The Levitical law, the laws of clean and unclean, the tabernacle and the temple with its outer court, its holy and most holy place, the priestly order and the high priest, the bounds set around Mt. Sinai, things and persons that might not be touched without causing defilement, sacred times and seasons, these, and much more, speak in unmistakable terms of the holiness of God. We are thus taught that if sinful man is to approach unto God, it must be through the blood of atonement. The holiness of God demands that before the sinner can approach unto and have communion with Him, some means of propitiation must be provided. This means of approach is set forth in the shed blood.
2. THE SIN OF MAN.
Light and erroneous views of the atonement come from light and erroneous views of sin. If sin is regarded as merely an offence against man, a weakness of human nature, a mere disease, rather than as rebellion, transgression, and enmity against God, and therefore something condemning and punishable, we shall not, of course, see any necessity for the atonement. We must see sin as the Bible depicts it, as something which brings wrath, condemnation, and eternal ruin in its train. We must see it as guilt that needs expiation. We must see sin as God sees it before we can denounce it as God denounces it. We confess sin today in such light and easy terms that it has almost lost its terror.
In view of these two thoughts, the holiness of God and the sinfulness of man, the question naturally arises: How is the mercy of God to be manifested so that His holiness will not be compromised by His assuming a merciful attitude towards sinful men in the granting of forgiveness, pardon, justification? The answer is: The only way in which this can be done is by means of the atonement.
3. THE FULFILLMENT OF THE SCRIPTURES.
We may add this third thought to the two already mentioned. There is a sense in which the atonement was necessary in order to the fulfillment of the predictions of the Old Testament—predictions inseparable from the person and work of the Messiah. If Jesus Christ were the true Messiah, then these predictions regarding His sufferings and death must be fulfilled in Him (Luke 24:25-27, 44; Isa. 53; Psa. 22; 69).