Time is the displacement between idea and action, the disproportion, which is created by emptiness and loss.
The purpose with an idea is of course that you want to protect yourself; it is an idea about safety and secureness.
But the action is always immediately; it doesn't originate from the past or the future. You can only act in the Now, but the action is so dangerous, so insecure, that we arrange ourselves after an idea, which we hope will give us a certain secureness.
The idea is the manifestation of the past, which uses the present as a means to the future. You are therefore absent either in the past time or in the coming time. The past sucks life out of the present. Memories and hopes are transformed into reality, while reality becomes emptiness.
The unreality in this consists in, that you only really exist in the hope about a richer future, or in the dream about a lost past.