The poet, described in ideal perfection, brings the whole soul of man into activity, with the subordination of its faculties to each other according to their relative worth and dignity. He diffuses a tone and spirit of unity, that blends, and (as it were) fuses, each into each, by that synthetic and magical power, to which I would exclusively appropriate the name of Imagination.

Ch. XIV - Biographia Literaria (1817)