and said to him, "Everyone serves the good wine first, and when the guests have drunk freely, then that which is worse. You have kept the good wine until now!"
Now, John was, by physical birth, a cousin to Jesus. However, John was born before Jesus was born. Probably in about the sixth month of Mary's pregnancy when John was born. Yet, John is saying of Him, "He is preferred before me: for He was before me." So, he is talking about that pre-existence of Jesus prior to His incarnation.