To expand on this:
Entropy is the measure of the disorder in a system.
According to the Second Law of Thermodynamics, entropy increases within a closed system and establishes the “arrow of time”. A video of balloon fragments followed by a popping sound and images of a balloon bouncing into a Rose bush is understood to be running backwards, because things don’t happen the other way around. There is a tendency for things that are organized, to become random.
In an open system like our body, we see the reverse happening. There is obviously greater organization developmentally from the moment of conception to the formation of an adult body. This is at the expense of greater disorganization around us as we get, cook and digest our food, breathe and drink.
In a condition of pure randomness there is no time.
I would like to speculate beyond this in regards to the organizing principles that lie behind the formation of the most elementary particles and how they became increasingly organized with the existence of new, more complex beings, until they resulted in our own individual existence, but I will leave it as this simple observation of how things are.
All this said, it is our spirit which experiences the participation of our bodies within space-time. The spirit and the body forms a unity, inseparable except at our death. This unity establishes ourselves as eternal beings set in time. The manifestation of our soul in time gives our life its quality of “past-present-future”. Within physics there are trajectories, and a before and an after only where a person designates a place in space-time. It is a human spirit who constitutes a frame of reference.