《太平广记·卷一·神仙一》
凝神修行自然会心静身正，你的肉体和心灵都会变得十分清洁干净，如此，身体不再劳顿，精神不再操劳，你就可以长生。
抱神以静，形将自正。必净必清，无劳尔形，无摇尔精，乃可长生。
Concentration will naturally keep your mind tranquil and your body pure, so that neither your body nor your mind will be subject to labor and fatigue, and you will achieve longevity.