Physicist Carlo Rovelli explains that our fundamental quantum understanding of nature does not include time or the notions past and future. Only in the second law of thermodynamics does the march from order to disorder appear in sequence. But order itself is a perceptual notion that is not consistent between observers. So, likely, we have socially constructed the illusive notion of time just as we have constructed the notion of consciousness.
YOUTUBE -6rWqJhDv7M Published on Jun 13, 2018.
39:28 
"Forget time"
> Following a line of research that I have developed for several years, I argue that the best strategy for understanding quantum gravity is to build a picture of the physical world where the notion of time plays no role. I summarize here this point of view, explaining why I think that in a fundamental description of nature we must "forget time", and how this can be done in the classical and in the quantum theory. The idea is to develop a formalism that treats dependent and independent variables on the same footing. In short, I propose to interpret mechanics as a theory of relations between variables, rather than the theory of the evolution of variables in time.
## Perspectival Origin of Entropy
42:12 Is Time's Arrow Perspectival?
> We observe entropy decrease towards the past. Does this imply that in the past the world was in a non-generic microstate? I point out an alternative. The subsystem to which we belong interacts with the universe via a relatively small number of quantities, which define a coarse graining. Entropy happens to depends on coarse-graining. Therefore the entropy we ascribe to the universe depends on the peculiar coupling between us and the rest of the universe. Low past entropy may be due to the fact that this coupling (rather than microstate of the universe) is non-generic. I argue that for any generic microstate of a sufficiently rich system there are always special subsystems defining a coarse graining for which the entropy of the rest is low in one time direction (the "past"). These are the subsystems allowing creatures that "live in time" ---such as those in the biosphere--- to exist. I reply to some objections raised to an earlier presentation of this idea, in particular by Bob Wald, David Albert and Jim Hartle.
## Your Brain Is a Time Machine
44:00 Our thinking cannot be thought without time ; and the emotional aspect of time
YOUTUBE cqwJHasGT9w Your Brain is a Time Machine | Dean Buonomano | Talks at Google
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See also, Daniel Dennett on the evolution of the human brain. bbc
Consciousness is the brain’s user illusion of itself. It is a format of internal unconscious representations where the representations are designed to gloss over the inessentials. The brain doesn’t need to know everything that is going on in the brain.
A reflection here: The Nature of Time