When we lose metaphor, we lose our capability to dream ourselves and our descendants into beauty.
There is everyday language, and the language used to speak of that which is sacred. In our indigenous languages even the everyday was metaphorical.
We need poetry in all of its aspects.
May Sarton said: "Poetry exists to break through to below the level of reason where the angels and monsters that the amenities keep in the cellar may come out to dance, to rove and roar, growling and singing, to bring life back to the enclosed rooms where too often we are only 'living and partly living'."