You can observe any disturbing feeling as it arises...and then...

1. You can let it hijack you, in which case it amplifies, and you get more disturbed.
2. You can focus on it obsessively, in which case it amplifies, and you get more disturbed.
3. You can indulge in it, in which case it amplifies, and you get more disturbed.

Those are all things people commonly do when they deal with negative feelings in a dysfunctional manner. They won't let go.

Apply it, for instance, to the many bad feelings Israelis and Palestinians have now about things that have happened between them...see what happens when they get hijacked by the feelings? Further very bad things happen.

Here's the other thing you can do, however, when you observe a disturbing feeling arising in you...if you wish to be in control of your own mind:

4. Just quietly observe the feeling as it arises. Don't act upon it, but observe. Don't identify with it, just observe it. Don't lend it any additional strength or indulge in it, just observe it.   Let it pass.

If you don't encourage a disturbing feeling, if you don't ally yourself with it, it passes quite quickly.

Since most people are addicted to their favorite bad feelings, they become caught up in amplifying and repeating them over and over again. That's when it becomes an emotional dysfunction. That's what produces unending feuds and arguments between people.

You have to be the one who is in control of your own peace of mind, rather than the bad feelings that arise from time to time being in control of you.