the progress of studiescomes from hard work; a subject is mastered throughdiligent study
? ～，荒于嬉。(韓愈《昌黎先生集·進學(xué)解》) The progress of studies comes from hard workand is retarded by frivolities.
業(yè)精于勤yè jīnɡ yú qín
形容學(xué)業(yè)由于勤奮而精深。the essential of work is diligence, a subject is mastered through diligent study