John interpreted Caiaphas" words for his readers. He viewed Caiaphas" statement as a prophecy. He spoke God"s will as the high priest even though he did not realize he was doing so. Caiaphas" motive was, of course, completely contrary to God"s will, but God overruled to accomplish His will through the high priest"s selfish advice. [source][source][source]
Caiaphas unconsciously prophesied that Jesus would die as a substitute for the Israelite nation (cf. Isaiah 53:8). The outcome of His death would be the uniting of God"s children scattered abroad, non-members of Israel as well as Jews, into one body, namely, the church (cf. John 4:42; John 10:16; Ephesians 2:14-18; Ephesians 3:6; 1 Peter 2:9). Ultimately it would unite Jewish and Gentile believers in the messianic kingdom (cf. Isaiah 43:5; Ezekiel 34:12). [source][source][source]