On the one hand, Geology is unbending in its demand for evidence: it is a strict inductive science. On the other hand, both its evidence and its results are to be realised only by the imagination. To be a true geologist, accordingly, one must be able to see the world with penetrating and imaginative eyes; nay, with something akin to the vision of a poet.

— The Earth by Edward Greenly (Forum series -- no.6) (Page 6 - 7)