(B) The Theological Basis of this Fact
(1) The sin in which the first man fell and in which every man falls is a sin against God because it is disobedience to God, and lack of love and respect towards Him. But rather it is rebellion against His kingdom and resistance to the work of His grace and His Holy Spirit, as well as being a lack of faith. That is why David the Prophet says in his Psalm: "Against You, You only, have I sinned, and done this evil in Your sight" (Ps. 51:4). That is why the righteous Joseph withheld from sinning, saying: "How then can I do this great wickedness, and sin against God?" (Gen. 39:9)
(2) All human beings sinned: "They have all turned aside, they have together become corrupt, there is none who does good, no, not one" (Ps. 14:3). The wages of sin is death (Rom. 6:23), and "thus death spread to all men, because all sinned' (Rom. 5:12).
(3) Because sin is against God and since God is infinite, then sin is infinite and its punishment is infinite, and we have discussed this issue before here on st-takla.org in other pages. Should it be redeemed, it must be by an infinite atonement, sufficient for the forgiveness of all the people of all generations to the end of the ages.
(4) Only God is Infinite. Therefore He Himself had to take flesh and become the Son of Man in order to replace man and "to be the propitiation for the whole world' (1 Jn. 2:2).
(5) This propitiation was effected by the Lord Jesus Christ to save the whole world. If He were not God, His propitiation would be utterly invalid because His propitiation derived its infinity from Him being Infinite God, of whom the Apostle said: "In Him dwells all the fullness of the Godhead bodily" (Col. 2:9).