Jesus Christ, in addressing the crowd of 5,000 who followed Him for physical sustenance rather than spiritual truth, clarifies the essence of God's work. He instructs them, saying, "This is the work of God, that you believe in Him whom He sent." Despite witnessing His miracles, which served as signs of His identity, the people failed to grasp their spiritual significance, focusing instead on material benefits. Jesus emphasizes that true belief in Him goes beyond mere acknowledgment of His existence or deeds. It involves cleaving to, adhering to, trusting, relying on, and having faith in Him as God's Messenger. This deep belief is not universal or easily attained, as it requires being appointed by the Father to know both Him and His Son. Jesus further explains that only those drawn by the Father can come to Him, and He will not cast them out, promising to raise them up at the last day. This divine appointment to true belief marks them as the firstfruits of God's spiritual creation, distinct from the rest of the world who will not know God until a later time.

Christianity requires faith in God as He is revealed in Jesus Christ. This faith involves accepting the truth of our deep spiritual need and the work of the divine Christ, who provides the basis of our salvation from sin through His death. It also encompasses belief in Him and in the demonstration of the truth of His work and teachings through the resurrection. The world remains disbelieving unless God Himself brings faith out of non-faith, just as He brings life out of death or creation out of nothing. God not only creates and loves but also leads those who have fallen into sin to faith, producing in them what they could never achieve on their own. In the story of Jesus and Thomas, one week after the resurrection, Jesus appears to Thomas to lead him to faith. Thomas, initially a doubter, responds with the highest profession of belief, worshiping Him and declaring, My Lord and my God. Jesus does not excuse Thomas's unbelief but comes down to his level to help him through, saying, Do not be unbelieving, but be believing. The presence of Christ, identified by the wounds in His hands, feet, and side, ultimately convinces Thomas, revealing the love of Christ as the greatest proof. Christ provides what is needed for honest intellectual questions, showing that while reasoned arguments are important, it is His love demonstrated by His death that ultimately convinces. Jesus further speaks of a great blessing, saying, Blessed are those who have not seen and yet have believed. This blessing is not for a subjective faith without evidence but for a satisfied faith that rests on what God provides, not yearning for visions, miracles, or other experiences as proof of God's favor. Such faith, superior to one based on visible signs, is common to all who call upon the name of Christ as God and Savior. The Gospel of John emphasizes this faith in Jesus Christ, highlighting numerous blessings that flow from believing in Him, including becoming children of God, receiving eternal life, deliverance from judgment, spiritual satisfaction, and the promise of resurrection. Through faith, believers also see the glory of God, live a holy life, become fruitful, and receive the benefits of Christ's prayers on their behalf. The purpose of John's Gospel is to lead people to believe that Jesus is the Christ, the Son of God, and through that belief, to have life through His name. From first to last, it serves as a testimony to Jesus Christ, encouraging everyone to believe in Him and enjoy God's blessings.

The first qualification for a Christian minister is a belief in God, followed closely by the conviction that the Bible is God's authoritative Word, containing His instructions for living. However, not all churches adhere to this principle, as seen in the case of Gretta Vosper, a minister at West Hill United Church in Toronto, who openly declared her atheism. Despite her lack of belief in a supernatural, interventionist divine being, she retained her credentials and position within the United Church of Canada, a denomination known for its liberal stance. At West Hill United Church, traditional elements of worship have been altered: prayer has become community sharing time, hymns have been rewritten to exclude references to God and Jesus Christ, and discussions of Them have been replaced with themes of love, compassion, and beauty. Vosper's approach reflects a shift toward progressive and humanistic ideology, focusing on creating healthy, engaged communities rather than adhering to biblical teachings.