Our master is not a filthy person. He is a noble without defilement. He is an Arahant (Arahant). Also, He did not understand a dharma learned from an external deity or a teacher. He did not have a teacher. He didn't have a pure knowledge that he heard from others. He had a self-knowledge, that is, a knowledge that he created through his own efforts, through the mind of Yoniso. You can listen to that wonderful wisdom, that amazing understanding Sri Saddharma through this channel.