If we had no need to sleep, would we view time differently? To see the Earth in a continuous cycle, revolving without pause, nature ebbing and flowing with its cyclical journeys of birth, growth, decline and death. To see the Earth from above and to always be bathed in sunlight. To observe the earth revolving and merely noticing the shadows come and go, always returning.
As we view the earth and our existence upon it, we see finite periods: years, seasons, months, days. We mark hours and minutes, seconds and divisions thereof. We see our lifetimes as finite, yet they are no different from the passage of light across the surface and the temporary absence of light which we describe as shadow. There is no end, no beginning when we view ourselves as no longer constrained to this earthly surface. We are not confined to the earth, merely that we are conditioned through experience to always associate ourselves as being so, without the consideration that we are much greater than this circumstance. Do not fear your passing into the shadow any more than you fear the going down of the sun. The shadows thus cast are merely the absence of light being shed onto this single lifetime, More lifetimes will come. Use the shadow to prepare for the forthcoming lifetime, when we will awaken again to a brand new day.