[169] for God did not grant this even to the all-wise Moses; not though he addressed innumerable requests to him, all having this object; but an oracle was delivered to him, telling him, "Thou shalt see my back parts, but my face thou shalt not [140] see;" [141] and the meaning of this is, that all the things which are behind God are within the comprehension of a virtuous man, but he himself alone is incomprehensible; and he is incomprehensible by any direct and immediate access (for by such means it is only explained what kind of being he is), but he may be understood in his subsequent and consistent faculties; for they, by means of the works accomplished by them, declare not his essence, but his existence.