In the consecrated host is a universal essentiality in an individual body. By acknowledging both aspects of it, the Christian God most realistically represents true absolute Spirit. This does not mean that Catholicism is absolute knowledge, however. But for self-consciousness this immediate presentness still doesn't have the form appropriate to spirit. Thus manifest religion has established truth implicitly, but not explicitly.
Truth is still representational.
It is up to the protagonist, self-consciousness, to evolve beyond manifest religion to absolute knowledge. This is its destiny, in a sense. One must take the implicit knowledge and beliefs of Catholicism and make them actual. Perhaps Hegel means that one must take the doctrines of the Church into one's own life, that through the living of these beliefs one makes them explicit, thus finally achieving absolute knowledge. Throughout the Phenomenology , Hegel describes the progress of consciousness towards total consciousness, absolute knowledge, and self-knowing spirit.