Neutro contains smile already; because at the moment Neutro was born, he was smiling. Neutro has such a power: fundamental smile. But if someone cannot keep Neutro mind state, what to do then? We can do gymnastic, Taiji, yawn smile Taiji.
If you’re used to smile breathing..life happy.Any moment when you want, you can smile. Any moment change to smile state. That is guaranteed Neutro mind state.Smile meditation starts from this moment. Then soul under smile control. True smiling soul. <<HE>> makes contact. <<HE>> just changes all things; improve treatment.
~ Prof. Park, Jae Woo, speaking in https://youtu.be/Vn378PSb1HU?t=22m