Anyone who has experienced the ego-less or enlightened state will know that the only way that this state can be achieved is by being in the NOW. The only difference between "past" and the present moment is the mental "photo" that we have in our minds of an event that happened. It still happened in this moment. The past doesn't exist. When we refer to something that happened in the past, we access a memory trace imprinted in our heads. Yes, things happen in succession. The earth completes one orbit around the sun and we call that a year and 10 orbits equals 10 years but it all happens NOW. We label a completed revolution and call it he beginning of a new year on our calendar. If we think in terms of how many billions of times the earth has orbited the sun it is easier to comprehend the nonexistens of past and future. Nothing has changed regarding the earth's billions of orbits around the sun and thus there is nothing to call a past event. Some events feel like they happened a long time ago but that is only because the memory trace (photo) imprinted in our minds has disolved more. The future is a mental projection of the mind. If we as human beings couldn't think or learn, but could only observe with our senses then time would be completely meaningless. Events would happen and we would just be there to observe them and see them clearly. Ego is based on past experiences (mental concepts, judgements and labels) and future projections of what it thinks it needs to achieve. The ego cannot exist in the now.