John establishes Jesus' authority from the beginning of his gospel.
John 20:31 the basis for all of the book of John.
It's important to KNOW Jesus' authority because HE is God!!!
Repent, walk in righteousness, practice holiness.
John 1:1-14 Jesus the Word became flesh.
John 3:1-7 You must be born again.
John 6:51 I (Jesus) am the solution to your flesh problem!