PROSPERO: Dull thing, I say so; he, that Caliban Whom now I keep in service. Thou best know'st What torment I did find thee in; thy groans Did make wolves howl and penetrate the breasts Of ever angry bears: it was a torment To lay upon the damn'd, which Sycorax Could not again undo: it was mine art, When I arrived and heard thee, that made gape The pine and let thee out.