" And it’s what’s true now that matters, sure as eggs is eggs. Think about it logically. Unless you’re a bit wrong in the head, you can remember what happened one minute ago clear as day. But you’ll be forgiven for being a bit hazy about the details of something you did or said twenty years ago. So, if there’s a discrepancy, the minute-old truth is far more likely to be correct than an inconsistent version dating back twenty years.

Twenty years ago – longer than that – I was Notker. Right now I’m Lysimachus, and this time tomorrow I’ll be Lysimachus II. And I have the scars to prove it. "

― K.J. Parker , How to Rule an Empire and Get Away with It (The Siege #2)