I found out about something that happened years ago. A situation in which I did something that was inappropriate and possibly hurtful to another creature (a pet). I'm pretty sure a very young part did it.
I love this pet dearly and I couldn't ever have imagined doing something hurtful to them. So, I've been struggling with a lot of shame and shock and anger about it. The pet never changed their behaviour so I guess it wasn't that bad? But to me that's just no excuse.
I don't know if I'm numb from it by now, or if I've accepted it, but I have many thoughts about it that are devoid of feeling.
I think that it is impossible to recognize bad people at first glance. In a lot of ways, they are just the same. They like TV shows or love their wife or have a passion for fishing... whatever. Just a normal person in a lot of ways.
It is the same for yourself. You always have the capacity for evil and you have to watch out for that. You can't think yourself to be "safe" just because you love people or are generally kind, or because you have empathy.
Ultimately, other people are unknowable.
Ultimately, you yourself can be unknowable.
How can one ever forgive themselves?