The way to longevity is to cultivate the spirit; the key in cultivating the spirit is to cultivate virtue. If virtue is absence, longevity cannot be achieved no matter what medicine you take. – Tang Dynasty Medical master Sun Si Miao.
養生之道, 重在養神; 養神之要, 重在養德.
德行不全, 縱服玉液金丹, 未能廷壽. – 唐代名醫孫思邈