《资治通鉴·魏纪·魏纪一》
当时有人传言诸葛瑾派遣亲信和汉王互通消息，孙权说： 我和诸葛瑾有生死不变的誓言，他不会背叛我，如同我不会背弃他一样。 
时或言瑾别遣亲人与汉主相闻者，权曰： 孤与子瑜，有死生不易之誓，子瑜之不负孤，犹孤之不负子瑜也。 
At that time, some people rumored that Zhuge Jin sent a confidant to communicate with Han Wang, and Sun Quan said: I and Zhuge Jin have an oath of life and death, he will not betray me, just as I will not betray him. 
<s>[INST] Kindly elucidate the central themes in this passage in English: 时或言瑾别遣亲人与汉主相闻者，权曰： 孤与子瑜，有死生不易之誓，子瑜之不负孤，犹孤之不负子瑜也。  [/INST] At that time, some people rumored that Zhuge Jin sent a confidant to communicate with Han Wang, and Sun Quan said: I and Zhuge Jin have an oath of life and death, he will not betray me, just as I will not betray him. </s>
Kindly elucidate the central themes in this passage in English: 时或言瑾别遣亲人与汉主相闻者，权曰： 孤与子瑜，有死生不易之誓，子瑜之不负孤，犹孤之不负子瑜也。
user
At that time, some people rumored that Zhuge Jin sent a confidant to communicate with Han Wang, and Sun Quan said: I and Zhuge Jin have an oath of life and death, he will not betray me, just as I will not betray him.
assistant