First, I give primacy to the sayings of Jesus. Second, I understand that Jesus is saying the Jesus is the ultimate source of truth. Third, I accept that Jesus was occasionally a tad idealistic for this fallen world... Forth, I accept that Jesus does not seem to have the formal education that Saul did as a Pharisee at the feet of the famous Torah Teacher Gamaliel. Fifth, I see Paul being practical and bringing some elements of the Pharisee culture (formal education) into the Gentile Church. Note: Paul uses Pharisitic sayings on occasion "I pass on to you what I have received...".. So, for a beginner, the Church offers "teachers", but to the more advanced, the Church offers the Scripture, which includes the sayings of Jesus. So, I can lazily watch anyone preach (teach) in Church or on TV, but I diligently test it all against the sayings of Jesus.