The Importance of Walls

I keep trying to think of it like you told me like a tap that I have to turn off, but I just, I can't find the source. The thoughts are coming from everywhere. If they are intruding from all sides, maybe it would be better to put up walls,. create a fortress around your mind that you can put up and take down as you wish. That sounds a little extreme. I don't want to shut myself off from the world. Of course. I'm not the person who has to put up defenses and be cold to people just to get through the day.