That which cannot be thought by mind, but by which, they say, mind is able to think: know that alone to be the Brahman, not this which people worship here. VI That which is not seen by the eye, but by which the eye is able to see: know that alone to be the Brahman, not this which people worship here. VII That which cannot be heard by the ear, but by which the ear is able to hear: know that alone to be Brahman, not this which people worship here. VIII That which none breathes with the breath, but by which breath is in-breathed: know that alone to be the Brahman, not this which people worship here. Ordinarily we know three states of consciousness only,--waking, dreaming and sleeping. There is, however, a fourth state, the superconscious, which transcends these. In the first three states the mind is not clear enough to save us from error; but in the fourth state it gains such purity of vision that it can perceive the Divine. If God could be known by the limited mind and senses, then God-knowledge would be like any other knowledge and spiritual science like any physical science. He can be known, however, by the purified mind only. Therefore to know God, man must purify himself. The mind described in the Upanishads is the superconscious mind. According to the Vedic Sages the mind in its ordinary state is only another sense organ. This mind is limited, but when it becomes illumined by the light of the Cosmic Intelligence, or the "mind of the mind," then it is able to apprehend the First Cause or That which stands behind all external activities. Part Second I If thou thinkest "I know It well," then it is certain that thou knowest but little of the Brahman (Absolute Truth), or in what form He (resideth) in the Devas (minor aspects of Deity). Therefore I think that what thou thinkest to be known is still to be sought after. Having given the definition of the real Self or Brahman, by which mortals are able to see, hear, feel and think, the teacher was afraid that the disciple, after merely hearing about It, might conclude that he knew It. So he said to him: "You have heard about It, but that is not enough. You must experience It. Mere intellectual recognition will not give you true knowledge of It. Neither can It be taught to you. The teacher can only show the way. You must find It for yourself."