[138] but with respect to that argument which was endeavoured to be established by the diminution of the sea, we may reasonably adduce this statement in opposition to it: "Do not look only at the islands which have risen up out of the sea, nor at any portions of land which, having been formerly buried by the waters, have in subsequent times become dry land; for obstinate contention is very unfavourable to the consideration of natural philosophy, which considers the search after truth to be the chief object of rational desire; but look rather at the contrary effects: consider how many districts on the main-land, not only such as were near the coast, but even such as were completely in-land, have been swallowed up by the waters; and consider how great a portion of land has become sea and is now sailed over by innumerable ships."