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Time is ultimately dependent upon the integrated extensiveness of being, experience (and space), and thought. You can see how this applies to photons in relation to time -- consider how the words "integrated extensiveness" apply.
Dreams improve upon memory and understanding by increasing (or adding to) the integrated extensiveness of being and experience (including thought) in and with time.(This effect is clearly evident in the works of genius, and also with the past/present/future extensiveness and superior predictability regarding the thoughts of genius.)
Since the self has extensiveness of being and experience (in and with time) in conjunction with the integrated and natural extensiveness of sensory experience, we spend less time dreaming (and sleeping) than waking. The integrated extensiveness of being and experience go hand-in-hand.
The natural and integrated extensiveness of being and experience go hand-in-hand -- and, in and with time as well.
Dreams are an emotional experience that occur during the one third of our lives that we spend sleeping, because emotion is one part (or one third) of feeling, emotion, and thought. Consistent with this, both feeling and thought are proportionately reduced in the dream. Thoughts and emotions are differentiated feelings. Dreams are essential for thoughtful and emotional balance, integration, comprehensiveness, consistency, and resiliency. Indeed, emotion that is comprehensive and balanced advances consciousness. If the self did not represent, form, and experience a comprehensive approximation of experience in general, we would be incapable of growth and of becoming other than we are.
Thought involves a relative reduction in the range and extensiveness of feeling. In keeping with this, dreams make thought more like sensory experience in general. Accordingly, both thought and also the range and extensiveness of feeling are proportionately reduced in the dream. (This reduction in the range and extensiveness of feeling during dreams is consistent with the fact that the experience of smell very rarely occurs therein.) Since there is a proportionate reduction of both thought and feeling during dreams, the experience of the body is generally (or significantly) lacking; for thought is fundamentally rendered more like sensory experience in general. Thoughts and emotions are differentiated feelings. By involving the mid-range of feeling between thought and sense, dreams make thought more like sensory experience in general. The reduction in the range and extensiveness of feeling during dreams is why there is less memory and thought therein.
Also, the unification of Maxwell's theory of light and Einstein's theory of gravity -- that is proven by the addition of a fourth spatial dimension --
demonstrates that this one third relation (i.e., three to one ratio) holds for BOTH space and time. Note the three to one relation of space dimensions to time in Einstein's theory; and note, as well, the three to one ratio (one third) of space dimensions in relation to said unification with the fourth spatial dimension.
Accordingly, I have shown that the extension of BOTH time and space in the dream is consistent with this one third. Moreover, this is all consistent with the fact that the dream is the fundamental union of gravity and electromagnetism/light.
See:
The Dream Fundamentally Balances and Unifies Gravity and Electromagnetism
http://radicalacademy.com/studentrefphilfmd13.htm
Time has an important place in physics.