Suppose you're the kind who never break their promises.
Let's say you made a promise about something to someone.
Let's say, you once heard a story about the benevolent nature of 'X', and it inspired you promise yourself to emulate 'X'.
But sometime later, you realise that the story about the benevolence of 'X' was false.
In fact, you have arrived to the conclusion that 'X' never existed, and the stories you had heard about him were baseless.
But you had made a promise to yourself. What happens to it?
And what if you can no longer get yourself to keep the promise?