Just as the more closely we look at something, the more we use our imagination, in the same way the more we look at the past, the more we see either a) the unknown or b) the future. A corollary of this is that it is the past that we should be looking at, since that is the foundation of all error. That is, our past.
All ideas are false unless they are kept living.
Which means, if memory is an idea, all memories are false, unless they can change.
Which means that history is wrong. All of it.
The relation between the past and the future is the same as the one between what is there and what is imaginary: they are the same.
So we need to know what history is in order to know what it is not.