Answer: The Bible says, “And without controversy great is the mystery of godliness: God was manifest in the flesh…” (1Ti 3:26). God’s incarnation is a great mystery. If God did not reveal the mysteries of this aspect of truth, no one would understand it.
As for what incarnation is, God’s word says, “The meaning of incarnation is that God appears in the flesh, and He comes to work among man of His creation in the image of a flesh. So, for God to be incarnated, He must first be flesh, flesh with normal humanity; this, at the very least, must be true. In fact, the implication of God’s incarnation is that God lives and works in the flesh, God in His very essence becomes flesh, becomes a man.” “The incarnate God is called Christ, and Christ is the flesh donned by the Spirit of God. This flesh is unlike any man that is of the flesh. This difference is because Christ is not of flesh and blood but is the incarnation of the Spirit. He has both a normal humanity and a complete divinity. His divinity is not possessed by any man. His normal humanity sustains all His normal activities in the flesh, while His divinity carries out the work of God Himself.” “Because He is a man with the essence of God, He is above any of created humans, above any man who can perform God’s work. And so, among all those with a human shell like His, among all those who possess humanity, only He is the incarnate God Himself—all others are created humans. Though they all have humanity, created humans are nothing but human, while God incarnate is different: In His flesh He not only has humanity but more importantly has divinity. His humanity can be seen in the outer appearance of His flesh and in His everyday life, but His divinity is difficult to perceive. Because His divinity is expressed only when He has humanity, and is not as supernatural as people imagine it to be, it is extremely difficult for people to see… Since God becomes flesh, His essence is a combination of humanity and divinity. This combination is called God Himself, God Himself on earth.”
From God’s words, we know that the incarnation is God’s Spirit clothed in flesh, that is, God’s Spirit is materialized in the flesh with normal humanity and normal human thinking, and thereby becomes an ordinary and normal person working and speaking among men. This flesh has normal humanity, but also has complete divinity. Though in outward appearance His flesh seems ordinary and normal, He is able to take on God’s work, can express God’s voice, and guide and save humanity. This is because He has complete divinity. Complete divinity means that all that God’s Spirit possesses—the inherent disposition of God, God’s holy and righteous substance, all that God has and is, God’s almightiness and wisdom, and God’s authority and power—these have all been materialized in the flesh. This flesh is Christ, is the practical God who is here on earth to do work and save mankind. From His outward appearance, Christ is an ordinary and normal Son of man, but He is substantively different from us created human beings. Created man has only humanity, he doesn’t have even the slightest trace of divine substance. Christ, however, not only has normal humanity; more importantly, He has complete divinity. So, He has God’s substance, He can represent God entirely, express all truths as God Himself, express God’s disposition and all that God has and is, and endow us with the truth, the way, and the life. No created man is capable of such feats. Christ works and speaks, expresses God’s disposition, and all that God has and is in His flesh. No matter how He expresses God’s word and does God’s work, He always does so within normal humanity. He has a normal flesh, there is nothing supernatural about Him. This proves that God has come into the flesh, He has already become an ordinary human. This ordinary and normal flesh has fulfilled the fact of “The Word Appears in the Flesh.” He is the practical God incarnate.