वेदान्त पारिजात सौरभ (भगवद् निम्बार्काचार्य - द्वैताद्वैत वेदान्त ब्रह्मसूत्र भाष्य सटीक)

[sū. 2. 3. 38.
ADH. 10.] VEDĀNTA-KAUSTUBHA 431
The individual soul alone is the agent. If buddhi be admitted to
be the agent, then "on account of the reversal of power", its instru-
mental power will cease, and it must come to have the power of an
agent. Moreover, if buddhi be the agent, then the power of enjoyment,
too, must pertain to it alone. This being so, bondage and release
must result on the part of buddhi alone.
COMPARISON
Rāmānuja, Śrīkaṇṭha and Baladeva
This is sūtra 37 in the commentaries of the first two, but sūtra 36
in the commentary of the last. Their interpretation is similar to the
last portion of Śrīnivāsa's interpretation, viz. that if buddhi or prakṛti
be the agent, the power of enjoyment too must belong to it.¹
SŪTRA 38
"AND ON ACCOUNT OF THE ABSENCE OF DEEP CONCENTRATION."
Vedānta-pārijāta-saurabha
If the soul be not an agent, then "the absence of deep
concentration", due to something which is absolutely different from
the non-sentient,² will result, and hence the soul is the agent.
Vedānta-kaustubha
"Deep concentration" means abiding as having Brahman for
one's soul, after meditating on one's own form,—distinct from the body,
sense-organs, mind and intelligence,—preceded by the stopping of the
functions of the mind. As the "absence of such a deep concentration",
the means to salvation, will result, if the individual soul be not an
agent,—it is known that the individual soul alone is the agent.
¹ Śrī. B. 2.3.37, p. 153, Part 2; Śk. B. 2.3 37, p. 154, Parts 7 and 8; G.B.
2.3.36, pp. 208-9, Chap. 2.
² Acetana-mātrāt, i.e. from even the slightest portion of the non-sentient.