What do you mean, sadness that can't be touched now can finally be used as a joke to tell a story? Time can't change the content of your story, but it can change the way you tell it?

This seems to be a sentence from an earlier romance novel. I have been studying for more than ten years. I feel very good, but I only remember a general idea: the pain you can't touch now can be told as a joke as time goes by. Time will not change the content of the story, but it can change your narrative style.