It remains to find the justificatory reason for this retroactive movement of the body, which seems illogical at first sight.
Let us inquire in what case and under the action of what emotions a man may shrink from the object which he is considering.
In the first place, he shrinks back whenever it inspires him with a feeling of repulsion. He shrinks from it particularly when it inspires him with fright. This is a matter of course and self-evident.
In what case does the body take an inverse direction to the object which attracts it? This we must know before we can explain the phenomenon in question.
We move away from the thing which we contemplate to prove to it, doubtless, the respect and veneration that it inspires. In fact, it seems a lack of respect to that which we love to approach it too closely; we move away that we may not profane it by a contact which it seems might injure its purity.
Thus the retrograde movement may be the sign of reverence and salutation, and moreover a token that the object before which it is produced is more eminent and more worthy of veneration.
A salutation without moving shows but little reverence, and should only occur in the case of an equal or an inferior.
In justification of the actual fact, let me give another observation of quite another importance.
When a painter examines his work, he moves away from it perceptibly. He moves away in proportion to the degree of his admiration of it, so that the retroactive movement of his body is in equal ratio to the interest that he feels in contemplating his work, whence it follows that the painter who examines his work in any other way, reveals his indifference to it.
The picture-dealer usually proceeds in quite another manner. He examines it closely and with a magnifying-glass in hand. Why is this? Because it is less the picture which he examines than the handiwork of the painter, the actual work which is the chief object of his survey.
But why does the artist move away from the work which he contemplates? The better to seize the total impression. For instance: if it be a full length portrait and the artist studies it too closely he sees, I will suppose, the nose of his portrait and nothing more. If he moves a little farther off he sees a little more, he sees the head; still farther and he sees both the head and the torso which supports it. Finally, moving still farther away, he gets a view of the whole and thus seizes its harmonious relations. This inspection may be called synthetic vision, and in opposition to this, direct vision, which I assumed before instinct taught me better, is but short and limited.