Expansive language presses against the limits of the worst habits of our theological imaginations, especially, for instance, assuming we know what a word like “father” means.
When Nathan Jennings says that liturgy is an “organic analogue of reality,” he means that the connections between the divine life and human life are not arbitrary. He also means that liturgical theology is something more than history (how liturgy developed) or anthropology (how people happen to behave in the liturgy). When we are doing liturgical theology we are encountering the very nature of God.
Remembering the past, thinking in the present, and imagining the future all interweave.