In the ancient discussion of the nature of the Self and the world, the sages examined the teachings found in the Upaniṣads, seeking to understand what is truly meant by statements about the vital forces, light, space, and the rest. They noted that the passage mentions the vital forces and other elements, suggesting that these too, like everything else, arise from the same ultimate source. Yet, they observed that for some, the mention of light as food is not to be taken literally, for light is not real food in the ordinary sense. The inquiry deepened as they considered that space and other subtle elements are also spoken of as causes, indicating that all these, too, originate from that single reality. The sages recognized a certain attraction—an inherent pull—drawing all things back to their source, and this is why the world itself is spoken of in these teachings. Some questioned whether the marks described in the scriptures refer to the individual soul or to the chief vital force. But it was explained that this has already been addressed: the marks indeed point to something beyond these limited entities. Jaimini, another revered sage, suggested that these references serve another purpose, as indicated by the questions and explanations found in the texts. Other teachers agreed, pointing to the careful connection of sentences throughout the scriptures. Āśmarathya, yet another sage, declared that the distinguishing characteristic is established by the very proposition set forth in the teachings. Audulomi explained that the discussion centers on the soul because it is about to depart, a state that naturally draws attention to its true nature. Kāśakṛtsna added that the reason is the continued existence of the soul, even as it leaves the body. Furthermore, it was taught that the original nature of the soul is affirmed, for there is no contradiction between the main proposition and the illustrative examples provided. The intention behind these teachings is also emphasized, and both traditions—those of scripture and those of the wise—declare the truth directly. All this, the sages agreed, is ultimately for the sake of the Self. The process of transformation, too, is discussed, and the source from which all emerges is repeatedly spoken of. Thus, by understanding this, all aspects have been explained—indeed, all have been explained. Moving forward, a possible objection was raised: if this understanding is accepted, would it not exclude the authority of the Smṛti texts? The answer given was reassuring: such exclusion arises only in other Smṛtis, not here. Moreover, the alternatives are not observed in practice, and by this reasoning, even the teachings of Yoga are addressed. Yet, it was insisted, the Self is different, as indicated by the words of the scriptures themselves. The apparent identification of the Self with other things is only due to the presence of distinctions, and this is something that can be seen. If someone claims that the Self is non-existent, this is not correct, for such a claim is merely a negation without substance. Even in ordinary acts like eating, the same kind of consequence would arise, which is unreasonable. There is, in fact, no comparable example to support such a view, and the defects in the opposing position become apparent. Reasoning alone, without the support of scripture, has no firm foundation. If one were to infer otherwise, endless uncertainty would result. Thus, the acceptance of other remaining views is also addressed. If someone argues that the absence of an experiencer is due to non-differentiation, it would be just like the world, which is not the case. The non-difference of the Self is established by words such as ‘origin’ and others found in the scriptures. Moreover, perception occurs only in the presence of the Self, and the existence of something other than the Self is also affirmed. If it is objected that the Self is called non-existent, this is not so, for the rest of the sentence and other words indicate another attribute. This is like the example of cloth, which, though made of threads, is recognized as something distinct, and like breath and other vital forces, which are known by their functions. Because the Self is designated as ‘other’, certain defects, such as the impossibility of action, might seem to arise. Yet, there remains something extra, for difference is clearly specified. Thus, the sages, through careful reasoning and reverent attention to the words of the scriptures, illuminated the true nature of the Self, the world, and their profound relationship.