《元史·列传·卷十七》
世祖深有感慨地说： 若不是卿指出，几乎误事，但恨用卿晚了。 
帝曰： 非卿言，几误，但恨用卿晚耳。 
The Emperor exclaimed: If you hadn’t pointed it out, I would have made a huge mistake. But it’s a pity that I didn’t start using you sooner. 
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 帝曰： 非卿言，几误，但恨用卿晚耳。  [/INST] The Emperor exclaimed: If you hadn’t pointed it out, I would have made a huge mistake. But it’s a pity that I didn’t start using you sooner. </s>
Explain the meaning of this Classical Chinese passage in English: 帝曰： 非卿言，几误，但恨用卿晚耳。
user
The Emperor exclaimed: If you hadn’t pointed it out, I would have made a huge mistake. But it’s a pity that I didn’t start using you sooner.
assistant