Self-cultivation lies in the combination of static and dynamic, too simple without exercise, too simple without calm and waves. Man's body and mind is a dynamic system, which requires both stillness and movement. Everyone's thinking and physical condition are different, so we should recognize the real needs. When thinking is complicated and confused, you should rest and be calm when you are tired. On the contrary, it needs the stimulation of exercise to accelerate the innovation of cells.
Everyone can feel this change and need, so we should always adapt to this change, move with heart and master the degree!