后天易吟三十首hòu tiān yì yín sān shí shǒu后天易吟三十首 hēng jiā shuí bù yuàn, zhēn gù shì zhī cháng.亨嘉谁不愿,贞固士之常。gān tǐ chōng gāng jiàn, kān yáo rèn zhí fāng.乾体充刚健,刊爻认直方。亨嘉谁不愿,贞固士之常。乾体充刚健,刊爻认直方。