My students and I were reading Athanasius and Hilary of Poitiers today on the topic of God’s self-disclosure. On one hand, the teaching that God is in some sense unknowable has always been a part of orthodox Christian belief. But on the other hand so has the claim that God has made himself known in Jesus Christ; ‘Emmanual,’ God is with us. To feel the tension you can go any number of places in the Christian tradition, but Athanasius and Hilary open this up really well.
This excerpt from Athanasius is on the Trinity and only indirectly about revelation (for Athanasius to talk about revelation is to talk about the Trinity), but it is just marvelous, so I had to post it:
As the Son is an only-begotten offspring, so also the Spirit, being given and sent from the Son, is himself one and not many, nor one from among many, but Only Spirit. As the Son, the living Word, is one, so must the vital activity and gift whereby he sanctifies and enlightens be one perfect and complete; which is said to proceed from the Father, that it shines forth and is sent and is given. The Son is sent from the Father; for he says, ‘God so loved the world that he gave his only begotten Son.’ The Son sends the Spirit; ‘If I go away,’ he says, ‘I will send the Paraclete.’ The Son glorifies the Father, saying: ‘Father, I have glorified thee.’ The Spirit glorifies the Son: for he says, ‘He shall glorify me.’ The Son says: ‘the things I heard from the Father speak I unto the world.’ The Spirit takes of the Son; ‘He shall take of mine,’ he says, ‘and shall declare unto you.’ The Son came in the name of the Father. ‘The Holy Spirit,’ says the Son, ‘whom the Father will send in my name’ (Letters to Serapion, on the Holy Spirit)