John 17 contains a richly symbolic Last Discourse by Jesus, in which the disciples are assured a place in the Father’s celestial house or temple. To fulfill this promise Christ reveals both the Father’s name and his glory to his disciples. Jesus’s discourse concludes with the promise of sanctification of the disciples, and their unification—or deification—with Christ and the Father. This paper explores how each of these ideas reflects the temple theology of the Bible and contemporary first-century Judaism.