The Gospel of John is more than a narrative; it is a testimony-a courtroom drama where Jesus stands as both the accused and the ultimate witness. His words and works reveal the Father, yet they are met with opposition, disbelief, and judgment from the world.This book explores the theme of testimony in John's Gospel, uncovering how Jesus' mission unfolds within a legal and public framework. The vocabulary of witness-words like "testify," "proclaim," and "confess"-shapes the Gospel's message, showing that to believe in Christ is to acknowledge God's truth. The witnesses who testify on His behalf-John the Baptist, the Scriptures, the Father, and His disciples-participate in revealing His divine identity.However, to reach a deeper understanding of this theme, the author examines key Johannine texts that highlight the affirmations of the witnesses, the object of their testimony, and the challenges they face. The book focuses on three fundamental texts in which the evangelist presents different aspects of testimony.Through a detailed study of John's language, themes and significant passages, this book sheds light on the life-giving power of Christ's testimony. It invites readers to discern His voice, embrace His truth, and recognize that faith in Jesus is not just belief-it is a response to the ultimate witness, the One sent by the Father to bring eternal life.