Idea for a story: At the end of the world the Last Judgment takes place. All the events that happened to humanity: good and bad, happy or sad, momentous and insignificant, are read from the book in which they have been recorded, moment after moment, since the beginning of eternity.
Life is in the past. What we delude ourselves to be living is the last judgment, a story so vividly read in the great book that we seem to see its words in action.
A reading. This would justify the sense of unreality that sometimes takes us. Would explain deja vu and premonitions.
We have already lived. All decisions have been taken. Good and evil deeds have been committed. Now they are just re-read for general edification and because this is the ritual that the Judgment requires: a reading, declaimed with such skill that at times we forget that it’s just a story.
Ideas for a tall story 
That explains a lot!
Right, Mario! But… are you saying that – or just reading?
Both, I am saying it, but I am saying it because it was written in the book. And indeed, moment to moment is the unfolding of someone reading the book, recreating the written story.