《史记·七十列传·范雎蔡泽列传》
假使大王您认为我的话可用，希望您推行并进一步使这种主张得以实现；如果认为我的话不可用，那么长时间的留我在秦国也没有什么意义。
使以臣之言为可，原行而益利其道；以臣之言为不可，久留臣无为也。
If your Majesty thinks my words are good, I desire that you will put them in practice, and carry out the principle to its full extent; but if you think them worthless, my long detention in your country will be without any purpose.