Jesus performed many miracles during his ministry. These miracles didn't really prove that he was the Son of God, but they certainly did draw crowds. The disciples who have relayed these stories to us through the Gospels were part of those crowds, sometimes as reporters, sometimes as witnesses. The disciples, for instance, didn't really see the water become wine. That happened in an outer hallway. They must have heard the details from the servants or from Mary.
Other miracles they saw with their own eyes, like most of the healings and the raising of Lazarus from the dead and the time Jesus walked on water. In a few rare instances, the disciples actually participated in the miracles, like the feeding of the 5000 or the stilling of the storm. These were special miracles. In their own hands th…