《魏书·列传·卷二十三》
现在如果阻断他西去的道路，刘裕必定上岸北犯，这样就使姚兴平安无事而我方却受攻击。
今若塞其西路，裕必上岸北侵，如此则姚无事而我受敌。
If we blockade his westward route now, Liu Yu will surely land and attack the north, which will make Yao Xing safe and sound while our side is attacked.
<s>[INST] Kindly elucidate the central themes in this passage in English: 今若塞其西路，裕必上岸北侵，如此则姚无事而我受敌。 [/INST] If we blockade his westward route now, Liu Yu will surely land and attack the north, which will make Yao Xing safe and sound while our side is attacked.</s>
Kindly elucidate the central themes in this passage in English: 今若塞其西路，裕必上岸北侵，如此则姚无事而我受敌。
user
If we blockade his westward route now, Liu Yu will surely land and attack the north, which will make Yao Xing safe and sound while our side is attacked.
assistant