《宋史·列传·卷一百九十四》
胡安国说： 内外之势，平衡则安，偏重则危。
安国言： 内外之势，适平则安，偏重则危。
Hu Anguo said: The situation both inside and outside needs to be balanced to be safe. If there is too much weight on one side, it will be dangerous.