…by faith we know that God wants to share the communion of his trinitarian life with us. In other words, he wants to make us his sons and daughters—in short, as the Christian tradition has not hesitated to say, his intimate friends. How better to accomplish this than by becoming one of us. While a shared human nature is fundamental to our relationships with others, it is only with particular human beings that we can have such relationships. Even a generous love for mankind as a whole is no substitute for knowing and loving particular people whom we can see, hear, address, touch, hold, and kiss. These people have names, they live somewhere, they have ethnic and social backgrounds, and so on. To bring us into the communion of trinitarian life, God first enters into the round of human existence and thus, as Aquinas loved to say, he adapts his action to our nature. He even has a mother whose “hand leaves his light / Sifted to suit our sight” (G. M. Hopkins). At the same time, God adapts our nature to his. “A Boy is born in Bethlehem,” we sing, “Wherefore rejoice Jerusalem / The Father’s Word on high doth take / A mortal form for mortals’ sake / … He took our flesh, to man akin / In all things like us, save in sin / That he might make our mortal race, Alleluia / Like God and like himself by grace, Alleluia, alleluia” (“Puer Natus Est in Bethlehem”). How could we share in the communion of trinitarian life if we were not made sharers—“partakers”—of the divine nature (2 Peter 1:4)? Listen to St. Athanasius: “the Son of God became man so that we might become God”.