To the human mind there is something almost illogical in the assertion that God became a man. It is like speaking about a square circle. Yet this is what Christmas says -- and we take refuge from our bewilderment not in explanation but in adoration (Ralph P. Martin).
In the beginning was the Word, and the Word was with God, and the Word was God. And the Word became flesh and dwelt among us, full of grace and truth (John 1:1, 14).
And we know that the Son of God has come and has given to us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life (I John 5:20).
A hymn to read, sing, hum, or whistle, to the glory of God: Let All Mortal Flesh Keep Silence (Liturgy of St. James. 5th. Century).