God became flesh because the object of His work is not the spirit of Satan, or any incorporeal thing, but man, who is of the flesh and has been corrupted by Satan. It is precisely because the flesh of man has been corrupted that God has made fleshly man the object of His work; moreover, because man is the object of corruption, He has made man the only object of His work throughout all the stages of His salvation work. Man is a mortal being, is of flesh and blood, and God is the only One who can save man. In this way, God must become a flesh that possesses the same attributes as man in order to do His work, so that His work might achieve better effects. God must become flesh to do His work precisely because man is of the flesh, and incapable of overcoming sin or divesting himself of the flesh. Though the substance and identity of God incarnate differ greatly from the substance and identity of man, yet His appearance is identical to that of man, He has the appearance of a normal person, and leads the life of a normal person, and those who see Him can discern no difference to a normal person. This normal appearance and normal humanity are sufficient for Him to do His divine work in normal humanity. His flesh allows Him to do His work in normal humanity, and helps Him do His work among man, and His normal humanity, moreover, helps Him carry out the work of salvation among man. Although His normal humanity has caused much tumult among man, such tumult has not impacted the normal effects of His work. In short, the work of His normal flesh is of supreme benefit to man. Though most people do not accept His normal humanity, His work can still be effective, and these effects are achieved thanks to His normal humanity. Of this there is no doubt. From His work in the flesh, man gains ten times or dozens of times more things than the conceptions that exist among man about His normal humanity, and such conceptions shall all ultimately be swallowed by His work. And the effect that His work has achieved, which is to say, the knowledge that man has toward Him, far outnumbers man’s conceptions about Him. There is no way to imagine or measure the work He does in the flesh, for His flesh is unlike that of any fleshly man; although the outer shell is identical, the substance is not the same. His flesh produces many conceptions among man about God, yet His flesh can also allow man to acquire much knowledge, and can even conquer any man possessed of a similar outer shell. For He is not merely a man, but is God with the outer shell of a man, and none can completely fathom or understand Him. An invisible and intangible God is loved and welcomed by all. If God is just a Spirit that is invisible to man, it is so easy for man to believe in God. Man can give free rein to his imagination, can choose whatever image he likes as God’s image to please himself and make himself feel happy. In this way, man may do whatever is most pleasing to his own God, and that which this God is most willing to do, without any scruples. What’s more, man believes that no one is more loyal and devout than he toward God, and that all others are Gentile dogs, and disloyal to God. It can be said that this is what is sought by those whose belief in God is vague and based on doctrine; what they seek is all much the same, with little variation. It is merely that the images of God in their imaginations are different, yet their substance is actually the same.

—The Word, Vol. 1. The Appearance and Work of God. Corrupt Mankind Is More in Need of the Salvation of the Incarnate God