《韩非子·显学》
再说，君主在听取一种学说的时候，如果认为是对的，就应该正式向官府公布，并任用倡导的人。如果认为是错误的，就应该驱逐他们，并制止他们的言论。现在是。
且夫人主于听学也，若是其言，宜布之官而用其身；若非其言，宜去其身而息其端。
Besides, when a monarch listens a doctrine, if he thinks it's correct, then he should formally announce it to the officials and employ its advocates. If he thinks it's wrong, he should expel them and stop their speech. That's how it is now.