IF YOU REALLY KNEW what God was saying,then why is He having to TEACH It AGAIN?

Brother Peter.Wasn't educated.Used to Curse.Was a Coward.Couldn't deal with Pressure.Jesus rebuked him.There were things wrong with him.He even lied about knowing Christ. He let his emotions lead him,at times.He was one of Jesus' INNER Circle friends.In this INNER Circle,
there was James and John,the sons of Zebedee,also called The Sons of Thunder.Even though his Brother Andrew is the one that BROUGHT him to Christ,PETER was the ONLY one,(out of he and his brother),that was in Jesus' INNER Circle,thus permitting him to SEE some things that the
other 9 Disciples DIDN'T see,or partake in.Peter walked on water,as The Lord EMPOWERED HIM;Peter witnessed the Transfiguration.Peter ALSO witnessed his mother-in-law being healed by Jesus.He's had some good points and some bad points.Just like US.The ADVANTAGE that HE had,that WE DON'T have,is that he SAW AND WALKED WITH Jesus,during Jesus' EARTHLY Ministry.You would think that there should have been NO FLAWS in this Brother's walk.You would think that Peter would have STRONG FAITH,BECAUSE he was walking WITH Jesus.There were a few PERSONAL problems that he had that caused him to mess up,when it came to his walk,and ONE of them was HIS MOUTH. He didn't KNOW when to shut up.Jesus was trying to tell him something that was instituted by satan:a hit on his life.satan had been discussing Peter AND ASKED if he could HAVE Peter,that he,(satan),may SIFT him--AS WHEAT! he wanted to pick Peter APART! Jesus was trying to WARN Peter,but PETER talked as if JESUS was WRONG and as of Peter WAS READY for the attack on his life! Some of US have done that.Some of US STILL do that! We don't KNOW
HOW to shut UP. During THE TAKING IN Season,SOME of us STILL want to PUT OUT! Jesus wants to ask THIS question,in this Lesson: "IF YOU REALLY KNEW what God was saying,then why is He having to TEACH It to you AGAIN!!"