《新唐书·列传·卷八十八》
人凭着元气生存，嗜好欲念从它产生，元气离开身体就会有病有灾，元气充盈就心舒体泰。
人乘气生，嗜欲以萌。气离有患，气完则成。
People live on vitality, and their hobbies and desires come from it. When the vitality leaves the body, there will be illnesses and disasters. When the vitality is full, the mind and body will be at ease.