《论衡·卷二十六·知实篇》
看到颜渊回来了，才知道他没有死；没有看见他回来的时候，说认为他死了。
见颜渊之来，乃知不死；未来之时，谓以为死。
Seeing Yan Yuan's return, he knew he was not dead; When he didn't see him coming back, he said he thought he was dead.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 见颜渊之来，乃知不死；未来之时，谓以为死。 [/INST] Seeing Yan Yuan's return, he knew he was not dead; When he didn't see him coming back, he said he thought he was dead.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 见颜渊之来，乃知不死；未来之时，谓以为死。
user
Seeing Yan Yuan's return, he knew he was not dead; When he didn't see him coming back, he said he thought he was dead.
assistant