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

arcir-ādinā tat prathiteḥ arciḥ—light; ādinā—beginning with; tat—that; prathiteḥ—because of being well known. It begins with light, for that is well known. Purport by Śrīla Baladeva Vidyābhūṣaṇa The enlightened souls travels to the world of the Supreme Personality of Godhead on a path that begins with light. Why is that? The sūtra explains, "tat prathiteḥ" (for that is well known). In the Chāndogya Upaniṣad (5.10.1) it is said: tad ya ittham vidur ye ceme 'raṇye śraddhāṁ tapa ity upāsate te arciṣam "This they know: They who perform austerities and worship the Lord with faith travel on the path that begins with light." This passage is taken from the chapter describing the knowledge of the five fires (pañcāgni-vidyā). Therefore the path that begins with light is traveled even by they who study the fire and other vidyās. In the Brahma-tarka it is said: dvāv eva mārgau prathitāv arcir-ādir vipaścitām dhūmādiḥ karmiṇāṁ caiva sarva-veda-vinirṇayāt "Two paths are famous. The path beginning with light is traveled by they who are enlightened with transcendental knowledge, and the path beginning with smoke is traveled by they who perform Vedic rituals. That is the conclusion of all the Vedas." This being so, it is understood that the scriptures describe a single path for the enlightened souls, and therefore the differences in the descriptions should be reconciled in the same was they were in the case of the attributes of the Lord. This is so because the knowledge to be described here is one, even though the scriptural texts seem to give different explanations. The conclusion, then, is that the path begins with light. Any other interpretation breaks the real meaning of the Vedic texts.