I have heard it said that a former US President once remarked "People tell you who they are by their actions. When people tell you who they are - believe them."
I believe (and rely) on the concept of grace and forgiveness. This post is not about that. A famous fisherman once asked a famous Carpenter on advice on that subject and if that's what you're looking for then I refer you to that as it is a lot more authoritative than I could ever wish to be.
This post is on trust.