We have to go back a little to see that John cites two passages from the book of Isaiah. In verse 38 he quotes from Isaiah 53:1, the great “Suffering Servant” passage that so plainly describes the ministry of the Lord Jesus Christ. John says the unbelief of the Jews, despite their seeing signs, was a fulfillment of the word of Isaiah in Isaiah 53. He then goes beyond this to assert their inability to believe and quotes from Isaiah 6 and the “Temple Vision” Isaiah received when he was commissioned as a prophet:
