'...for we physicists believe that the separation between past, present, and future is only an illusion, although a convincing one.'
Which is fascinating considering all the while he discussed 'synchronous events', talking about relativity, and how often time appears in his famous equations, eg E=mc^2 and K=8πG/c^4 . (c=meters/sec) A unitized 'spacetime' banishes time as a separable consideration.
It's as though we are trapped into a way of perceiving things that is wrong, but we haven't escaped that trap. OR... all of space-time is simply a giant, frozen, 4-D crystal in which the only thing moving - through the 3-D plane we call space - is our consciousness. If that's so, everything has already happened. OR... maybe that's mostly true, but not quite.
If that last thought intrigues you, you might enjoy reading Strange Life of Ivan Osokin by P.D. Ouspensky.