43. (The soul is) a part of the Lord, on account of the declarations of difference, and (because) in a different way also some record that (Brahman) is of the nature of slaves, fishers, and so on.
We have shown that the individual soul and the Lord stand to each other in the relation of what is being acted upon and what is acting upon. This relation is observed in ordinary life to exist only between things connected, such as a master and a servant, or a fire and its sparks. Now as the soul and the Lord also are acknowledged to stand in the relation of what is acted upon and what is acting, a doubt arises whether their connexion is analogous to that of a master and a servant, or to that of a fire and its sparks.
The pûrvapakshin maintains that either the matter is to be considered as undetermined, or that the connexion is like that of master and servant, because that connexion only is well known to be the relation of ruler (Lord) and subject ruled.
To this the Sûtra replies that the soul must be considered a part of the Lord, just as a spark is a part of the fire. By 'part' we mean 'a part as it were,' since a being not composed of parts cannot have parts in the literal sense.--Why, then, do we not view the Lord, who is not composed of parts, as identical with the soul?--'On account of the declarations of difference.' For such scriptural passages as 'That (self) it is which we must search out, that it is which we must try to understand' (Kh. Up. VIII, 7);