There’s a brief glimpse into Jesus’ identity before he started his public ministry. Early on Jesus and his disciples are invited to a wedding at Cana in Galilee. Mary is there because the wedding involved either friends or relatives of hers; maybe it was the wedding of one of Jesus’ sisters. They are trying to keep up appearances, but run out of wine.
Mary is distressed – so it probably was the wedding of one of Joseph’s daughters and she was the ‘bride’s mother.’ Mary already knew that Jesus could fix things. Jesus turns water into wine – only Mary and the servants knew what had happened; all the guests at the wedding thought it was very good wine.
This is to show that Jesus didn’t receive a ministry at a point in time as someone with a healing ministry does, but even as a child he was able to perform miracles if he so wished.