“The distinction between past, present and future is only a stubbornly persistent illusion.” Albert Einstein, letter written after the death of his friend Michele Besso, March 1955
I. The Structure of Everything
Start with what physics actually says, because what physics actually says is strange enough that most people have been quietly shielded from the full implication of it.
General relativity, Einstein’s theory of gravity and spacetime, does not describe a universe in which the past is gone and the future has not yet arrived. It describes a universe in which all moments exist simultaneously as coordinates in a four-dimensional structure. The past is not a memory. The future is not a possibility. They are locations. The moment you were born exists at a specific coordinate in the block. The moment you will die exists at another. Both are present in the structure right now, in the same way that New York and Los Angeles are both present on a map regardless of where you are standing.
The physicist Julian Barbour spent his career developing this view into its most rigorous form, arguing in his 1999 book The End of Time that time itself is an illusion generated by the structure of the block, not a fundamental feature of reality. What we experience as the flow of time, the sense of moving from moment to moment, is not the universe changing. It is consciousness moving through a fixed structure, the way a reader’s eye moves across a page that exists in its entirety before and after the reading. The page does not change as you read it. The book is already complete. You are discovering what was always there.
Einstein came to this conclusion independently and held it for the rest of his life. When his closest friend Michele Besso died in 1955, weeks before Einstein himself would die, he wrote to the Besso family that “Michele has preceded me a little in leaving this strange world. This means nothing. For us convinced physicists, the distinction between past, present and future is only a stubbornly persistent illusion.”
