The Sign Says

This miraculous sign at Cana in Galilee was the first time Jesus revealed his glory. And his disciples believed in him. John 2:11 NLT

A Sign

• the most common greek word used for Jesus miracles in the NT is dynameis which denotes a 'mighty work', but John does not use it in his gospel.

• the word here is semeia 'signs'. The NT miracles are not mere miracles; they are all signs of some underlying reality. 1

• like John the Baptist testimony in chapter 1:6, his purpose was to tell about the light so that everyone might believe. The signs are to point to the light so everyone might believe.
  
  
• This follows the pattern of John seen in John 20:31  But these are written so that you may continue to believe that Jesus is the Messiah, the Son of God, and that by believing in him you will have life by the power of his name.  A __________ (sign, testimony, witness) that causes belief which gives you life
  

Sources
The Gospel of John, F.F. Bruce p 72