I see, that’s probably something only Americans would generally understand :D

What do the numbers mean?

Setup an autocorrect phrase :D

If someone betrays you - you can either be upset at this, feel terrible for a long time

Or you can be thankful for them showing their true colors, thankful for the opportunity to enhance your people-reading skills, i.e. learn how to prevent this better (or identify that it simply happens sometimes, even with good prevention skills), perform the correct consequences (i.e. cutting them out of your life, minimizing your dependence on them), and then move on with the new state of life.

I’m not saying one won’t feel bad at first - but there’s no reason to continue with that past the initial automatic reaction, how fast you can “move on” depends on how good you are at this. After handling the situation properly, there’s no reason to continue to feel bad, feeling bad about it is just a motivator to do something about it, if there’s nothing to do anymore, there’s no reason to feel bad anymore.

You can extend the same line of thinking to literally anything - you get fired from your job, you go hungry, you suffer some debilitating injury/sickness, you get put in a concentration camp due to be executed (“Man’s search for meaning” is an example of this).

Which interpretation is this, and what is the other one?

You can change your (psychological) reaction to everything. All psychological suffering is chosen by yourself and can be stopped if you choose not to suffer.

Of course this is simple, not easy. Almost no one can do it.

Most people I meet don’t believe this and hate that I’m saying this.