Mbh 12.203.1b

Similarly, though never apprehended by the senses, yet nobody can say that the Soul, which dwells in all creatures, which is subtile, and which has knowledge for its essence, does not exist. People see the world reflected on the moon's disc in the form of spots. Though seeing, they do not know that it is the world that is so reflected there. Even such is the knowledge of the Soul. That knowledge must come of itself. The Soul depends upon the Soul itself. Men of wisdom, reflecting on the formlessness of visible objects before birth and after destruction, behold by the aid of intelligence, the formlessness of objects that have apparent forms. So also although the Sun's motion cannot be seen, yet persons, by watching its rising and setting, conclude that the sun has motion.[680] Similarly, those who are endued with wisdom and learning behold the Soul by the aid of the lamp of intelligence, though it is at a great distance from them, and seek to merge the fivefold elements, which are near, into Brahma.[681] Verily, an object cannot be accomplished without the application of means. Fishermen catch fish by means of nets made of strings. Animals are captured by employing animals as are the means. Birds are caught by employing birds as the means. Elephants are taken by employing elephants. In this way, the Soul may be apprehended by the principle of knowledge. We have heard that only a snake can see a snake's legs. After the same manner one beholds, through Knowledge, the Soul encased in subtile form and dwelling within the gross body. People cannot, through their senses, know the senses. Similarly, mere Intelligence at its highest cannot behold the Soul which is supreme. The moon, on the fifteenth day of the dark fortnight, cannot be seen in consequence of its form being hid. It cannot be said, however, that destruction overtakes it. Even such is the case with the Soul dwelling in the body.