Madhvaon Brahma Sūtra 2.3.23

Though the soul is atomic, still it is possible that he pervades the body, just as a drop of Harichandana (sandal ointment of the best description) although in actual contact with one particular spot of the body only, per- vades (i.e., causes refreshing sensation all over) the body. So it is said in the Brahmândapurâna. “The soul though only of atomic size, stands pervading the whole body he occupies, just as the drops of Harichandana (coming in contact with particular parts of the body), extend all over the body (by producing a refreshing sen- sation).”