Man is used to the fact that there are languages which he does not at first understand and which must be learned, but because art is primarily visual he expects that he should get the message immediately and is apt to be affronted if he doesn't.
“Turkeys, quails, and small birds, are here to be seen; but birds are not numerous in desart forests; they draw near to the habitations of men, as I have constantly observed in all my travels.”