http://www.dam.brown.edu/people/mumford/blog/2018/Reflections.html

Science only studies correlations between events that can be reproduced, independent of time. On the other hand, the conscious life of a person is at all times structured into past, present and future. The word “present” has no meaning in physics. Physics typically sets up situations in an abstract time and space that can be realized in many space-time points of the real world. I want to argue that it is this experience of a present instant, the now that is always changing yet is always our one and only unique present, the one that each of us owns, that that is the real core of what we call consciousness.