שכמו שנשמת האדם היא ממלאה כל רמ״ח אברי הגוף, מראשו ועד רגלו
By way of analogy: The human soul2 pervades all 248 organs of the body, from head (the highest part of the body) to foot (the lowest part of the body);
The soul pervades the body to the extent that no organ or portion of it remains void of the soul.
ואף על פי כן עיקר משכנה והשראתה היא במוחו, ומהמוח מתפשטת לכל האברים
nevertheless, the soul’s principal abode (in a revealed form) and dwelling place (in an all-encompassing, non-revealed form) is in one’s brain, and from the brain the soul is diffused throughout all the organs;
This takes place in all the organs simultaneously, for (as the Rebbe explains) this “diffusion” of the soul refers to the life-force from which the organs derive their vitality — in which respect all organs are equal. This is one aspect of the soul’s emanation from the brain to the organs, and in chassidic terminology it can be termed “light” — a revelation which is equal throughout. A second aspect of the emanation that the organs derive from the soul which is in the brain is the following:
וכל אבר מקבל ממנה חיות וכח הראוי לו לפי מזגו ותכונתו
[moreover,] each organ receives from it (the soul) a different form of life force and functional power appropriate to it according to its (the organ’s) composition and character:
In other words, the difference between the functional ability of one organ and that of another does not derive from the organ itself (like water in a colored glass, for example, which takes on the color of its containing vessel). Rather does each organ draw from the soul its ability to see or hear, and so on, as the Alter Rebbe continues:
העין לראות
the eye receives from the soul a life-force and ability to see; the power of sight accords with the smooth and translucent nature of the tissue of the eye;
והאזן לשמוע, והפה לדבר, והרגלים להלוך
the ear receives from the soul a life-force and ability to hear, the mouth to speak, and the feet to walk3 — each organ in the body, in accordance with its composition and character, receives its life-force and ability from the soul which “dwells” and becomes revealed initially in the brain —
כנראה בחוש, שבמוח מרגיש כל הנפעל ברמ״ח אברים וכל הקורות אותם
as we clearly sense how in the brain one is conscious of all that occurs within the 248 organs and of everything experienced by them, because the brain is the nerve-center and principal abode and source of the life-force of the entire body.
The Rebbe here adds a commentary which clarifies the subject.
By way of introduction: The life-force from the soul which animates the body comprises two aspects. One is its life-giving force — in that the whole body is alive and draws its vitality from the soul. In this aspect, there is no difference between one organ and the next. The head, for example, is no more alive than the foot, just as the foot is no less alive than the head. The entire body, with all its organs, is equally alive throughout. In chassidic terminology, this aspect of the life-giving force is called the ‘light“ of the soul (for light shines equally upon everything around the light-source, regardless of the quality or nature of the objects receiving the light).
The second aspect of the soul’s life-force is the specific functional power which each organ draws from the soul. This power is unique to each organ — the eye receives from the soul the power to see, the ear to hear, the mouth to speak, and the foot to walk.
The manner in which the organ receives the latter life-force and functional power can be explained in two ways.
One is that the life-force emanating from the soul to the organ is utterly “plain” and uncompounded, possessing none of the diverse qualities and powers of the various organs. According to this explanation, the various functional powers of the organs would be differentiated (with respect to the life-force emanating to them from the soul) only after that life-force actually becomes enclothed within the organs. For example, only after the life-force becomes enclothed within the eye would it become the power of sight, and only after it becomes enclothed within the ear would it become the power of hearing.
An analogy to this explanation would be water in a colored glass. Although it remains colorless, yet since it is seen through the walls of a white or red vessel, for example, it seems white or red to the viewer. Likewise each organ receives a plain, uncompounded life-force from the soul, and it is the organ that gives the life-force enclothed within it its specific functional ability: the eye enables the life-force to give the power to see, and the ear enables it to give the power to hear.
The second possible explanation — and that accepted by Tanya — is that the soul, despite its pristine, uncompounded essence, includes in potential form all the powers of the various organs, and it is these faculties which each individual organ receives. The eye receives, from the life-force of the soul, the power to see, and the ear receives from it the power to hear. These powers were originally included in potentia within the soul, and each becomes revealed as the life-force becomes enclothed within the respective organ. Thus the power to see or hear does not originate only when the life-force becomes enclothed within the eye or ear; it already exists in potentia within the comprehensive life-force emanating from the soul, although it is not yet revealed. Tanya proceeds to explain that this is the correct explanation.
The commentary of the Rebbe explains why we must accept this second explanation. If we were to say that the various functional powers are not differentiated (in potentia) within the life-force until after it becomes enclothed within the organs (like water or light which does not itself possess a color, but acquires it when viewed through colored glass), then the brain would be conscious of the same sensation from what is experienced in the eye as from what is experienced in the ear, because these sensations have already left their respective organs. (Thus too, water removed from a white vessel is no different from water removed from a red vessel: once removed from the vessel, it loses the vessel’s color. Likewise, “messages” conveying sensations from the eye would be no different from those coming from the ear — since they have already left their respective organs.)
One might argue (according to this explanation which Tanya does not accept) that when a particular organ calls into being a functional power in the life-force drawn into it from the soul, this differentiation becomes acquired in the life-force (like an ingot of silver which, once it has been molded into the shape of a vessel, remains in that shape later, too). According to this argument, the difference effected by each organ in the life-force drawn into it from the soul, remains also in the sensation transmitted from the organ back to the brain — even after it leaves the organ. This would account for the different messages received by the brain for the varying sensations and occurrences experienced by the eye and ear, for example.
If, however, we say that the soul, which is based in the brain, utterly transcends any kind of differentiation (even a differentiation in potentia, in which the various powers of the organs are included within the soul), then the soul within the brain would not distinguish between the sensation of what happens in the eye and the sensation of what happens in the ear or other organs, because the soul itself (according to this explanation) is utterly plain and uncompounded. Even, therefore, if the messages coming from the various organs to the brain are indeed different one from another, yet this difference would not be distinguished by the soul in the brain, which utterly transcends all differences between organic functions.
We must therefore say that a difference exists between the various functional powers later revealed in the organs even before the life-force is actually drawn from the soul to the organs. The Tanya will now explain at which level of the soul this differentiation takes place.
