"For the time being, let us note that alongside the union of the God of faith and the God of the philosophers, which we recognize in the first article as the basic assumption and structural form of the Christian faith, a second, no less decisive alliance appears, namely that of the logos and sarx, of word and flesh, of faith and history.  The historical man Jesus is the Son of God, and the Son of God is the man Jesus.  God comes to pass for man through man, nay, even more concretely, through the man in whom the quintessence of humanity appears and who for that very reason is at the same time God Himself."


--  Ratzinger's Introduction to Christianity, p. 142.