It's internal strength! Bing Xin's positive explanation: I have no distractions in my heart, and my mind is as clear and transparent as ice. Even if there is any external interference, I don't care, I want to be calm, so that I can stand still and concentrate on my heart and reach the state of no self, that is, there are no distractions in my heart, even my own existence, eyes, ears and mouth. Top-down mutual care should mean that the cycle of luck cannot be interrupted, spitting and receiving should echo each other, expressions and expressions should depend on each other, all thoughts should be concentrated, there should be no distractions inside and outside the heart, and the state of mind should be as clear and transparent as ice without distractions.