How do we know Jesus performs miracles?

In the Gospel of John, the miracles of Jesus serve a specific purpose: to reveal Him as the Christ, the Son of God. John explicitly states that he recorded these miracles so that readers might believe in Jesus and therefore receive life through His name. The healing of the nobleman's son is the second of seven miracles recorded by John and shows Jesus' power over sickness and his ability to heal from a distance, confirming His divine authority. The man believed Jesus' word, demonstrating the nature of faith and the transformative power of believing in Christ.