Contours formed by Nature are infinetly more enjoyable than ones crafted my Man.
I don't know if I can say that this is a tenet that has stood the test of time (although I'm not denying that you might actually feel that way).
I might go with something like "the best courses are typically built on the best bits of land, with the best terrain and sandy soil, and are designed to take maximum advantage of the natural contours of the site."
But even on great sites doesn't the hand of man get involved in one way or another? I've not played at Pacific Dunes, but Tom Doak has mentioned on this site where certain areas were built up, or altered from the "natural" pre-existing land to make a golf hole work best. Is it true, then, that a pre-existing contour that he used is inherently more enjoyable than a contour that he had to create? If no-one ever told you, would you be able on your own to tell the difference?