Once before Jesus hinted at the church, which would grow much later. The good shepherd has “other sheep that are not of this sheep pen” (10:16). Now Jesus turns directly to concerns for others who will believe as a result of his disciples’ work (17:20–26). It is interesting that Jesus’s chief concern in 17:20–23 is again for unity. The later church of John must have been torn by divisions if 1 John is evidence (cf. 1 John 2:7–11, 18–21). Again he asks that the Father-Son relation wo…