《宋史·列传·卷一百一十五》
应当另立耶律氏的后人，使他分散为君长，则我国有存亡继绝之义，敌国有瓜分辐裂之弱，与邻近崛起的金国，势均力敌。 到这时，又认为郭药师一定会反叛。
宜别立耶律氏之宗，使散为君长，则我有存亡继绝之义，彼有瓜分辐裂之弱，与邻崛起之金国，势相万也。 至是，又言郭药师必反。
The descendants of Yelu should be established separately, and he should be appointed as the monarch. Thus, our country may exist or perish and continue or cease. The enemy country is weak and vulnerable. It is evenly matched with the rising power of the Jurchen in the neighboring area. By this time, it was believed that Guo Yaoshi would definitely rebel.