Time: a limited, unrepeatable resource and a relative and perishable measure of the flow between two instants, a river of events and the soul of this world, an image of eternity in motion and the most valuable of resources, a relatively persistent illusion since a simple minute it is enough to dream an entire existence, a now in constant expansion that is not real and a necessary consequence of all past, necessary cause of all future where each second is past, present and future in itself, engendering a perpetual metamorphosis.