Read John 2.
This chapter shows us two sides of Jesus’ power. The miracle in Cana shows his miraculous power (vv. 1-11) and the cleansing of the temple shows his authoritative power (vv. 13-22).
Jesus’ first miracle, “water to wine,” was different from the others he performed. Jesus’ other miracles relieved the suffering of others through healing or provided for their human physical needs (such as the feeding of 5000). But this miracle merely saved a young couple from social embarrassment. To run out of wine as they did (v. 3) was bad form in Jesus’ society. It indicated either poor planning or poverty or stinginess–none of which was good. This miracle saved the couple from losing social status but it didn’t restore anyone’s limbs or life.
So why did Jesus do it? His mother (indirectly) asked him to do it (v. 3) so it honored her. But, more importantly than that, it “was the first of the signs through which he revealed his glory; and his disciples believed in him” (v. 11b). Disciples were already following Jesus (v. 2a); this miracle–which was mostly private (v. 9)–showed his miraculous power to the disciples. This display of power authenticated Jesus’s message and called for faith from those who were following Jesus.
That was the purpose of all the miracles–to show the truth of Jesus’s message. Those who had already believed his message (or were getting close to believing it) saw divine power that matched the inner conviction in their spirits to his message. Those who disbelieved Jesus’ message also discounted his miracles. Their choice to reject Jesus would not be overturned, even in the face of great, miraculous power.
Although we don’t expect to see miracles ordinarily today, you have seen God work in your life in powerful, unexpected ways? Others around you might explain that work of God as coincidence or be unaware of it altogether. But if you’ve seen God answer specific prayers you’ve prayed, you know that he’s real and powerful.
Likewise if you’ve seen God act in some other way in your life. Have these works of God in your life stimulated in you to even greater faith?