《论衡·卷二·命义篇》
人有凶吉，好像一年中作物有丰收和歉收。人有盛衰，东西有贵贱。
人之有吉凶，犹岁之有丰耗，命有衰盛，物有贵贱。
People have good and bad luck, just like crops have good and bad harvests in a year. People have prosperity and decline, and things have high and low prices.