The art of not taking things personally
I feel a lot of this advice is only really actionable if there's trust on the other side for the other person to be comfortable with opening up to you, but also it automatically assumes the other person is in the wrong and this advice doesn't really encourage any kind of self reflection either. To know who is really in the wrong often requires readiness to self reflect and an external opinion who isn't likely to take sides.I feel it might be best to hold off before giving your coworker unsolicited advice and counselling otherwise you run the risk of making things worse by coming off tone deaf, and in worst cases as trying to gaslight them.A lot of the time you just need to accept you can't control how other people will react, most of the time you can't fix them, and it's not your job to (unless you're their manager lol). By that logic if you can't control their reactions, to the best of your ability don't let it dictate your mood too, otherwise you're letting them control your mood by proxy with their own behaviour