The self is the soul and consciousness is the symptom of the soul. Just like a tree has its essence, the self, originally in the small seed from which it grew. Yet to break a seed open will reveal no such potency for it to grow into such a huge plant. But the power is there. Likewise, to take salt and mix it with water renders the salt invisible; yet, by tasting the water, we can know the salt is there. Similarly, in the material body, the self exists, though we do not directly perceive it. However, Bhagavad-gita (13.34) explains: "O son of Bharata, as the sun alone illuminates all this universe, so does the living entity, one within the body, illuminate the entire body by consciousness." Therefore, just as we cannot perceive the salt mixed in the water except by taste, we also cannot see the soul in the body except by recognizing the symptom, which is consciousness.