《资治通鉴·汉纪·汉纪五十二》
管宁少年时与华歆是朋友，曾一起锄菜，看到地上有一块黄金，管宁继续挥锄不止，视黄金如同瓦砾，华歆却将黄金拾起后又扔掉。
宁少时与华歆为友，尝与歆共锄菜，见地有金，宁挥锄不顾，与瓦石无异，歆捉而掷之，人以是知其优劣。
When Guan Ning was young, he was friends with Hua Xin. They often weeded the garden together. They found a piece of gold on the ground. Guan Ning continued to hoe the ground and thought the gold was as worthless as tiles. Hua Xin picked it up and threw it away.
<s>[INST] Kindly elucidate the central themes in this passage in English: 宁少时与华歆为友，尝与歆共锄菜，见地有金，宁挥锄不顾，与瓦石无异，歆捉而掷之，人以是知其优劣。 [/INST] When Guan Ning was young, he was friends with Hua Xin. They often weeded the garden together. They found a piece of gold on the ground. Guan Ning continued to hoe the ground and thought the gold was as worthless as tiles. Hua Xin picked it up and threw it away.</s>
Kindly elucidate the central themes in this passage in English: 宁少时与华歆为友，尝与歆共锄菜，见地有金，宁挥锄不顾，与瓦石无异，歆捉而掷之，人以是知其优劣。
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When Guan Ning was young, he was friends with Hua Xin. They often weeded the garden together. They found a piece of gold on the ground. Guan Ning continued to hoe the ground and thought the gold was as worthless as tiles. Hua Xin picked it up and threw it away.
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