John 17:21
That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
Original Language Analysis
Cross References
Historical Context
This prayer occurred in the Upper Room (or possibly the Garden of Gethsemane) on the night before Jesus' crucifixion. Having prayed for Himself (John 17:1-5) and for the disciples (17:6-19), Jesus expanded His intercession to include all future believers (17:20-26). The prayer for unity was poignant given the immediate circumstances—within hours, the disciples would abandon Jesus and scatter (Mark 14:27, 50). Peter would deny Him, Thomas would doubt, and rivalries about greatness had surfaced even at the Last Supper (Luke 22:24). Yet Jesus prayed not only for their restoration but for the unity of all who would believe through their apostolic testimony. Early church history demonstrates both the struggle and the power of Christian unity. Acts portrays the Jerusalem church as unified ('they were all with one accord'), crossing socioeconomic barriers (Acts 4:32-37). Yet divisions emerged—between Hebrews and Hellenists (Acts 6), regarding Gentile inclusion (Acts 15), and between Paul and Peter (Galatians 2). The epistles repeatedly call believers to unity (Ephesians 4:3-6, Philippians 2:1-5, 1 Corinthians 1:10). Throughout church history, this verse has been interpreted variously: Roman Catholics citing it for institutional unity under papal authority, Protestants emphasizing spiritual unity in doctrinal essentials, and ecumenical movements using it to pursue organizational mergers. The verse doesn't prescribe specific structures but grounds Christian unity in Trinitarian communion and missional purpose.
Questions for Reflection
- What does it mean for believers to be 'one' as the Father and Son are one, and how is this different from mere organizational unity?
- How does Christian unity (or disunity) serve as evidence to the world about Jesus' identity and mission?
- In what ways can believers pursue the unity Jesus prayed for while maintaining commitment to biblical truth?
- What is the relationship between union with Christ ('in us') and unity with other believers ('that they all may be one')?
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Analysis & Commentary
In the High Priestly Prayer, Jesus intercedes for the unity of all believers: 'That they all may be one' (ἵνα πάντες ἓν ὦσιν). This is not organizational or institutional unity but spiritual, relational unity modeled on Trinitarian communion. The pattern is explicitly stated: 'as thou, Father, art in me, and I in thee' (καθὼς σύ, πάτερ, ἐν ἐμοὶ κἀγὼ ἐν σοί). The Father's being 'in' the Son and the Son 'in' the Father describes the mutual indwelling of persons in the Trinity—perichoresis in theological language. Believers are called to participate in this divine unity: 'that they also may be one in us' (ἵνα καὶ αὐτοὶ ἐν ἡμῖν ὦσιν). The phrase 'in us' indicates believers' unity is not merely with each other but participation in the very life of the Triune God through union with Christ and indwelling by the Spirit. The purpose of this unity is missional: 'that the world may believe that thou hast sent me' (ἵνα ὁ κόσμος πιστεύῃ ὅτι σύ με ἀπέστειλας). Christian unity serves as evidence to the watching world that Jesus is the Father's sent one. The verb 'believe' (πιστεύῃ/pisteuē) is in the present subjunctive, suggesting ongoing, continuous belief. When believers manifest supernatural unity—transcending ethnic, social, and cultural divisions—it demonstrates that Jesus is who He claimed to be. Divisions among Christians, conversely, hinder the gospel's advance by contradicting the unity Jesus prayed for and the Trinity exemplifies.