Time, which measures everything in our idea, and is often deficient to our schemes, is to Nature endless and as nothing. ~ Scottish geologist James Hutton
Physics has struggled with time to the point of exasperation. In the conceptual spacetime which acts as the stage of existence, time is a dimension that stands apart from those of space, which glom together to attribute location.
The only reason for time is so that everything doesn’t happen at once. ~ Albert Einstein
Time does not flow in physics. In quantum math, moments in time are a wave function. The timing of when is utterly probabilistic, causality a perspective of sequence.
Physics posits the present as the only point of time: the sole moment of existence. The past is a shadow, the future an imagined prospect.
In special relativity, time is a conditional perception, as is any attribution of causality, which is the favorite thing the mind does with time: suss that one thing leads to another.
In the ambient realm, events insistently appear to occur in sequence. Causality is casually ascribed. This is an illusion of continuity by a mind which abhors discontinuity.
The innate inclination is to take sensory perception at face value: the naïve realism that actuality is reality, an objective world flowing temporally. As the perception of time is that of a relentless vector, it is assumed to be so.
Here we are, trapped in the amber of the moment. ~ American writer Kurt Vonnegut
The only time in which existence manifests is now. All other temporality is either a memory of the past or a projection of a future. Moment by moment, time crystalizes in the mind as the medium upon which matter traverses space.
Time, space, causation are mental categories, arising and subsiding with the mind. ~ Nisargadatta Maharaj