1 This is what we proclaim to you: what was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and our hands have touched (concerning the word of lifeâ€"2 and the life was revealed, and we have seen and testify and announce to you the eternal life that was with the Father and was revealed to us).3 What we have seen and heard we announce to you too, so that you may have fellowship with us (and indeed our fellowship is with the Father and with his Son Jesus Christ).4 Thus we are writing these things so that our joy may be complete.
- The opening echoes the prologue of John's Gospel (John 1:1, 14), emphasizing the pre-existence and incarnation of Christ ("what was from the beginning").
- John stresses the apostles' direct, physical, sensory experience with Jesus ("heard," "seen," "looked at," "touched"), establishing the authority of their testimony.
- "Word of life" refers to Jesus Christ himself, the embodiment and source of eternal life.
- The "life was revealed" points to the incarnation, where the divine, eternal life became visible and accessible in Jesus.
- The purpose of the apostolic proclamation is to bring believers into fellowship (Greek: *koinonia*) with the apostles and, through them, with God the Father and Jesus Christ.
- *Koinonia* implies shared life, participation, and community rooted in the shared experience of Christ.
- John writes to ensure the fullness of joy for both the writers and the readers, linking joy to fellowship and truth (cf. John 15:11).
- This prologue establishes the foundation for the entire letter: authentic Christian life is based on the historical reality of Jesus Christ and results in fellowship with God and other believers.
- The repetition of "we have seen and heard" underscores the reliability and firsthand nature of the apostolic witness against potential false teachings (like early Gnosticism).