Seven I AM's

John is filled with a witness or testimony of who he is that calls for belief or faith which results in life if faith is put in him. The seven I AM's are Jesus own testimony of His deity. Jesus said:

I AM the bread of life (6:35)
I AM the light of the world (8:12)
Before Abraham was, I AM (8:58)
I AM the good Shepherd (10:11)
I AM the resurrection, and the life (11:25)
I AM the way, the turth, and the life (14:6)
I AM the true vine (15:1)

21:30,31

John 21:30,31 Now there are many other signs, not written in this book, which Jesus did in the presence of his disciples; but these have been written in order that you may believe that Jesus is the Christ, the Son of God, and that, believing, you may have life in his name.

We see John's purpose in these verses. That we may believe that Jesus is the Christ and that believing we may have life in his name. Through out John we see witnesses and testimonies to who Jesus Christ is. We have the seven signs, the seven I Am's, Jesus testifying of himself, disciples and others testifying that He is son of God. All these things are written that we would believe in Jesus.

There is another component of this. When we believe we have life in his name. So there is a witness so that we would believe and life would be imparted to us.

The Witnesses in John

The theme of witness pervades the whole of John's gospel. There is :

The witness of John the Baptist (1:6-8)
The witness of the Father (5:32, 37; 8:18)
The witness of the Son (8:14, 18)
The witness of the Spirit (John 15:26)
The witness of the works of Christ (5:36, 10:25)
The witness of the scriptures (5:39)
The witness of the disciples (15:27) including the witness of the disciple that Jesus loved (19:35, 21:24)
The purpose of the witness was that all should believe (20:31)