The distinction between the revealable and unrevealable, which has been already expressed by the contrast of 'glory' and 'grace, now appears in the distinction between the 'face' which cannot be looked on, and the 'back' which may be. Human language and thought are out of their depth here.
I can sketch for you the leading features which all eyes saw in Madame de Mortsauf; but no drawing, however correct, no color, however warm, can represent her to you. Her face was of those that require the unattainable artist, whose hand can paint the reflection of inward fires and render that luminous vapor which defies science and is not revealable by language but which a lover sees.
As a complete man, constant, generous, full of honest courage, as a hardy follower of Thought wherever she might lead him, above all, as a confessor of that Truth which is forever revealing itself to the seeker, and is the more loved because never wholly revealable, he is an ennobling possession of mankind. Let his own striking words characterize him:
I know, of course, that all that is but the imperfect presentation of partially apprehended, and partially revealed, and partially revealable truth. But what I desire to fix upon is that one dreary thought of this fold, into which the grim shepherd has driven his flock, and where they lie cribbed and huddled together in utter inactivity. Carry that with you as a true, though incomplete thought.