What is life? – Interpretation of life and present moment. Part i

Time is not sensed directly but experienced psychologically; the present moment emerges as a neuropsychological phenomenon constructed from sensory information processed by the brain but it's also something that we treat as a dimension in physics.

Our experience of reality, from the moment we are born until the moment we die, unfolds as if we develop one second after another - only "forward" through time. One second ago remains in the past forever.

We experience reality with continuously updating frames of a single present, the Now, which suddenly turns into many moments ago, then into even more yesterdays and eventually to distant years.

According to physical theories, however, every moment of time exists simultaneously.

From the perspective of physics, a possible interpretation is therefore that our capacity to experience reality is simply limited to processing one moment at a time, rather than experiencing an entire lifetime at once.

Neuroscience provides models which represent our experience of time, and if physics were to describe it, the representation of the present moment P could be defined as:

P(t;τ):=δ(t−τ)

where t represents any moment along our experienced timeline, and τ denotes the current “now”.