上古天真论4 - 中英文跟读自读

今时之人不然也，以酒为浆，以妄为常，醉以入房，以欲竭其精，以耗散其真，不知持满，不时御神，务快其心，逆于生乐，起居无节，故半百而衰也。

On the other hand, people nowadays are quite different, because they intoxicate themselves exorbitantly, replace a normal life with a life of abuse, have sexual intercourse while intoxicated, exhaust their pure energy through gratification of their desires, waste their true energy through careless and prolonged consumption, fail to retain their energy in abundance and to guard their spirits constantly, rush to the gratification of their hearts to the contrary of the true happiness of life, live their daily lives in an irregular pattern. 

It is for this reason that they can only live half of their life span.