《三国志·魏书·程郭董刘蒋刘传》
当初，郭嘉到北边去面见袁绍，对袁绍的谋臣辛评、郭图说： 有智谋的人会谨慎地衡量主君，所以提出的建议都得到周全地执行，就可以成就功名。
初，北见袁绍，谓绍谋臣辛评、郭图曰： 夫智者审于量主，故百举百全而功名可立也。
At first, Guo Jia went north to meet Yuan Shao and said to Yuan Shao's counselors Xin Pi and Guo Tu: People with wisdom will carefully weigh their masters, so the suggestions they put forward will be fully implemented, and they can achieve success.