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

bhagavāṁs tv eva me kāmaṁ brūyāt
"O master, please teach me the truth."
In the same way Upakośala (Chāndogya Upaniṣad 4.10.1-4.14.3), even though
he had already attained spiritual knowledge from the sacred fires, nevertheless
approached his spiritual master for instruction. In these two passages of the
Chāndogya Upaniṣad it is clearly seen that the mercy of the spiritual master is the
most important.
Here someone may say: If that is so, then what is the need of doing anything at
all? One should not think in that way. One should still study the scriptures and
follow the spiritual path. In the Śvetāśvatara Upaniṣad (6.23) it is said:
yasya deve parā bhaktiḥ
"One should engage in devotional service to the Supreme Personality of
Godhead."
In the Śruti-śāstra it is said:
śrotavyaḥ mantavyaḥ
"One should meditate on the Supreme Personality of Godhead and hear His
glories."
In the Smṛti-śāstra it is said:
guru-prasādo balavān
na tasmād balavattaram
tathāpi śravaṇādiś ca
kartavyo mokṣa-siddhaye
"The spiritual master's mercy is most important. Nothing is more important.
Still, in order to attain liberation one should certainly hear the glories of the
Supreme Personality of Godhead and serve Him in many ways."