The idea that Paul’s gospel revolved around realized eschatology (but not “over-realized eschatology”) is absurd. Paul ardently rejected the proto-gnostic realization of Jewish eschatology of his day (cf. 1 Corinthians 15:12; 2 Thessalonians 2:2; 1 Timothy 6:20; 2 Timothy 2:18), likening it to spiritual “gangrene” (2 Timothy 2:17). Realized eschatology does irreparable damage to biblical faith, particularly concerning (1) the Day of the LORD, (2) the cross, and (3) Jewish election. First, it takes the focus off the return of Jesus and mitigates urgency concerning the imminence of the Day of the LORD. Second, it changes the standard of discipleship from daily embrace of the cross and martyrdom to some form of spiritually realized “kingdom.” Third, it inevitably introduces an alternative “supersessionist” redemptive narrative that invalidates the unique calling of Israel. -  John P. Harrigan, Discipling the Gentiles into the Hope of Israel