Dialectics is the “D” word of theology. It summons the spectre of Barth. Reformed theology, though, while not historically Barthian (whatever that means) has always affirmed analogical reasoning (see Bavinck).
Analogical reasoning says a thing is and is not like another thing. This is a form of dialectics.
God is revealed in the human flesh of Jesus but in a sense he is also veiled in the flesh of Jesus.