《晋书·志·第十章》
如果妻子还在而同意丈夫再娶，丈夫活着而妻子能够改嫁，不是夫妻之义断绝又是什么呢? 
今妻在许以更聘，夫存而妻得改醮者，非绝而何。 
If the wife is still alive and agrees to her husband remarrying, if the husband is alive and his wife is able to remarry, isn't that the severance of the marital obligation?
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 今妻在许以更聘，夫存而妻得改醮者，非绝而何。  [/INST] If the wife is still alive and agrees to her husband remarrying, if the husband is alive and his wife is able to remarry, isn't that the severance of the marital obligation?</s>
Identify the key themes in this Classical Chinese text and explain them in English: 今妻在许以更聘，夫存而妻得改醮者，非绝而何。
user
If the wife is still alive and agrees to her husband remarrying, if the husband is alive and his wife is able to remarry, isn't that the severance of the marital obligation?
assistant