You cannot be stressed, angry, sad, depressed, unhappy, etc., if you are not thinking about it. All emotional responses have a direct link to thinking, which is always a narrow, singularly focused view of life, and it is likely made up as well. In short, thinking about what is happening is not your friend; instead, it is your deception.
There is, however, a part of you that sees all and knows all, all without knowing anything at all. Confusing? Yes, but it is that part of you that never listens to the other voice in your head that chatters incessantly. “Quiet” is spacious, teeming with life, and has no ears to hear what you, otherwise, noisily think.
You need not “focus” on listening. That’s just another thing to think about. All you need to do is be quiet. The first thing you might hear is your heartbeat. That is the door, and it’s anyone’s guess what’s on the other side. Walk through it anyway.