《颜氏家训·养生篇》
关于得道成仙的事情，不能说全是虚假，只是人人的寿命长短取决于上天，很难说会碰上好运还是惨遭厄运。
神仙之事，未可全诬；但性命在天，或难钟值。
Regarding the matter of attaining the Tao and becoming an immortal, it cannot be said that it is all false. It is just that everyone's life span depends on heaven and it is difficult to say whether they will be lucky or unlucky.