"A century before Borges’s famous proclamation — “time is the substance I am made of” — and more than a century and a half before Einstein revolutionized human thought by annealing our two primary modes of existence to one another in the single entity of spacetime, Søren Kierkegaard writes: "Man is a synthesis of psyche and body, but he is also a synthesis of the temporal and the eternal." Centuries before physicists came to explore the science of why we can’t remember the future, Kierkegaard probes our familiar temporal ordering of events and experiences ..." (read more)