《史记·七十列传·扁鹊仓公列传》
我想要全部学到他精妙的医术，公孙光说： 我的秘方医术都拿出来了，我对你不会有所吝惜，我已经老了，没有什么再让你学习的了。
臣意欲尽受他精方，公孙光曰： 吾方尽矣，不为爱公所。吾身已衰，无所复事之。
I wanted to learn all his exquisite medical skills, and Gongsun Guang said: I have taken out all my secret medical skills, and I will not be stingy with you, I am old and there is nothing more for you to learn.