Joh 7:38 He that believeth on me, as the scripture hath said, out of his belly shall flow rivers of living water.
Joh 11:25 Jesus said unto her, I am the resurrection, and the life: he that believeth in me, though he were dead, yet shall he live:
Joh 11:26 And whosoever liveth and believeth in me shall never die. Believest thou this?
This is simpler than yours.
Christ's audience at that point in history was "The Lost Sheep of the House of Israel." He wasn't preaching to the Gentiles. Paul was sent by the "Ascended Christ" to preach "The Grace Gospel" to the Gentiles.