Somewhat related, I read a while ago (there's even a book on this topic, can't recall the title) that our brain/mind is a hypothesis testing machine. i.e., it e

Somewhat related, I read a while ago (there's even a book on this topic, can't recall the title) that our brain/mind is a hypothesis testing machine. i.e., it expects the world to be in a certain way and ask our body to act accordingly and if the hypothesis turns out to be false then it'll act surprised. The converse of it was quite interesting. If you force your body to behave a certain way then corresponding emotion will follow. Example; forcing your face to smile will lead to happy feeling. Goes to show mind-body connection is way stronger than what we imagine it to be.