《凿壁偷光》主要写了匡衡喜欢读书。
匡衡小时侯就喜欢读书，就是家里很穷，买不起蜡烛，到了晚上就没有办法看书。一天晚上，匡衡看见墙壁裂了缝，邻居家里的烛光从裂缝透了过来，匡衡找来一把凿子，将这道裂缝处凿出一个小孔，立刻，一道烛光射了进来，匡衡就可以看书了。
读了这篇文章，我十分感动。匡衡这样喜欢读书，而我们却如此顽皮，我真感到羞愧不已，想到自己的父母的打工赚钱，就是为了让我们读好书，而我们却不懂事，不努力读书，整天吃喝玩乐，不懂得父母对我们的期望。
现在我读了《凿壁偷光》这个故事，我不由得想，如果我们每个人都能像匡衡那样刻苦学习，努力再努力，那国家一定会变得更加强大。

Kuangheng word Chih-kyu, Diligence without a candle; neighbor candle and found wanting. Wall cited its value is to wear light, in order to read the book Ying-rays. Man does not know the surname Yi Ren, Andrew many books, value for their domestic helpers to do is not claim. Host Strange, ask Heng, Heng said: "would like to have the master over the reading of the book." Owner laments, capital give book, gradually into the university.