Human consciousness is subject to three states. The Waking state, the Dream state and the Dreamless Sleep state. In the waking state all our inner and outer senses work. The inner senses are; The Intellect, the Ego and the Mind. The outer senses are the five cognizing and the five working senses. These senses are fully active during our waking state. So long as the mind thinks, the intellect decides, the Ego is self-conscious, the eye sees, the ear hears, etc., they are acting. And activity (Rāja) brings about the reaction of weariness (Tama). In other words, the senses become tired out, owing to incessant work and need rest. It is the state of weariness of the senses that makes us feel exhausted and seek rest. But the senses cannot have full rest as long as we are in a waking state, for their activity never ceases while we are awake. Here Nature's law steps in and draws a veil between the senses and their objects, the veil of Tama, born out of the excessive work of Rāja. We fall asleep. But in the first stage of sleep our senses still sustain their activity, though in a lesser degree than in the waking state, owing to their still cognizing reflections of the objects, and scenes impressed on our mind while we are awake. This is called the dream state of consciousness, Dreams are of three kinds. The ordinary dream is made up of the blended reflections of impressions of scenes and thoughts ill natural or fantastic shapes. The second kind of dream is a clear unmixed reflection of the mind's impressions of some of our experiences in a previous birth. The third kind of dream is a reflection cast upon our pure consciousness of coming events from their Karmic impressions on the Ether or on our own aura. The ordinary dreams belong to the dream state. The other two classes of dreams are experiences during the dreamless state of sleep, generally in the morning just before awaking.