We have to know the truth about the past to discover out future.

There are always consequences to the truth.

Over time, hidden truths morph in the dark soil of deceit into something much worse.

Well I haven't fucked much with the past,
But I've fucked plenty with the future.

- Babelogue

I know no way of judging the future but by the past.

...whenever something doesn't make sense it means some part of the story is missing.