A quote by Vladimir Nabokov found in Richard Feynman's hand written notes.
Feynman on time:
"It may prove useful in physics to consider events in all of time at once and to imagine that we at each instant are only aware of those that lie behind us." We stand on a dividing line from which the future is invisible. Can nature travel across and back?
"How would such a path appear to someone whose future gradually became past through a moving present?..."