This is a different kind of post… As a retired psychotherapist, I know the advantage of drawing and allowing the subconscious to express itself. The same can and does happen with Zentangle-type art if it is not planned out or forced in any way. I often pull out a tile if I’m feeling strong emotion (including anxiety) and lose myself into this wonderful meditative activity.
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Yesterday was my son’s 24th birthday… The infant son who only lived thirty days and never got to come home from the hospital. I was amazed how my body reacted to the date in spite of not feeling great sorrow. My body remembered what my mind tried to forget. 
I sat down with my trusty pen and pulled out a tile. This was the result. I didn’t realize it was heart-shaped with an empty section until I was through. I have two other biological children who are reflected as sections of the heart. There are even more remarkable revelations that I’ll not share here, but how amazing was this tile?! I felt so much better when I was finished… The feelings were expressed without words.