गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

1.1.16, 1.1.17, 1.3.5, 1.3.21, and 1.3.41.
The Vedic literature gives the following guidelines for the interpretation of
obscure passages:
upakramopasaṁhārāv
abhyāso 'pūrvatā-phalam
artha-vādopapattī ca
liṅgaṁ tātparya-nirṇaye
"The upakrama (beginning), upasaṁhāra (ending), abhyāsa (what is repeated
again and again), apūrvatā (what is unique and novel), phalam (the general
purpose of the book), artha-vāda (the author's statement of his own intention),
and upapatti (appropriateness) are the factors to consider in interpretation of
obscure passages."
If we apply these criteria to the śruti-śāstra, we will clearly see that the Supreme
Personality of Godhead and the individual spirit soul are described here as two
distinct entities.
Let us analyze the following passage from Śvetāśvatara Upaniṣad (4.6-7) in the
light of these six criteria.
dvā suparṇā sayujā sakhāyā
samānaṁ vṛkṣaṁ pariṣasvajāte
tayor anyaḥ pippalaṁ svādv atty
anaśnann anyo 'bhicakāśīti
"The individual spirit-soul and the Supersoul, Personality of Godhead, are like
two friendly birds sitting on the same tree. One of the birds (the individual atomic
soul) is eating the fruit of the tree (the sense-gratification afforded to the material
body), and the other bird (the Supersoul) is not trying to eat these fruits, but is
simply watching His friend.
samāne vṛkṣe puruṣo nimagno
'nīśāya śocati muhyamānaḥ
juṣṭaṁ yadā paśyati anyam īśam
asya mahimānam iti vīta-śokaḥ
"Although the two birds are on the same tree, the eating bird is fully engrossed
with anxiety and moroseness as the enjoyer of the fruits of the tree. But if in some
way or other he turns his face to his friend who is the Lord and knows His glories,
at once the suffering bird becomes free from all anxieties."
In this passage the upakrama (beginning) is dvā suparṇā (two birds); the