《三国志·吴书·陆逊传》
当时建昌侯孙虑在堂前修建一座斗鸭栏，建造十分精巧，陆逊严肃地说: 您应当勤读经典，增加自己的知识，修建这些东西有什么用? 
时建昌侯虑於堂前作斗鸭栏，颇施小巧，逊正色曰： 君侯宜勤览经典以自新益，用此何为？ 
At that time, Sun Lü, the Marquis of Jianchang, was building a duck fighting area in front of the hall, which was very exquisite. Lu Xun said solemnly, "You should immerse yourself in reading classics and broaden your knowledge. What’s the point of spending time on building these things?"
<s>[INST] Kindly elucidate the central themes in this passage in English: 时建昌侯虑於堂前作斗鸭栏，颇施小巧，逊正色曰： 君侯宜勤览经典以自新益，用此何为？  [/INST] At that time, Sun Lü, the Marquis of Jianchang, was building a duck fighting area in front of the hall, which was very exquisite. Lu Xun said solemnly, "You should immerse yourself in reading classics and broaden your knowledge. What’s the point of spending time on building these things?"</s>
Kindly elucidate the central themes in this passage in English: 时建昌侯虑於堂前作斗鸭栏，颇施小巧，逊正色曰： 君侯宜勤览经典以自新益，用此何为？
user
At that time, Sun Lü, the Marquis of Jianchang, was building a duck fighting area in front of the hall, which was very exquisite. Lu Xun said solemnly, "You should immerse yourself in reading classics and broaden your knowledge. What’s the point of spending time on building these things?"
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