The Vedanta Sutras of Badarayana, Commentary by Sankara (SBE38), tr. by George Thibaut [1896] at sacred-texts.com

23. There is no contradiction, as in the case of sandal-ointment.

Just as a drop of sandal-ointment, although in actual contact with one spot of the body only, yet produces a refreshing sensation extending over the whole body; so the soul, although abiding in one point of the body only, may be the cause of a perception extending over the entire body. And as the soul is connected with the skin (which is the seat of feeling), the assumption that the soul's sensations should extend over the whole body is by no means contrary to reason. For the connexion of the soul and the skin abides in the entire skin, and the skin extends over the whole body.