What does John 1:14 reveal about who God the Father is?
Nothing explicit is said about God the Father. We know that the Father is the one who sent the Son to make him known (John 1:14b). The Father is thus one who reveals himself, he does not remain hidden.
14 And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.