At Festivals people looked at three things:
On the last day of the Feast of Tabernacles the priests would take water from a fresh source and throw it everywhere. As they showered the emerging water extravagantly on the people and on the altar this was a reminder of God’s faithful provision in life, and as a message for the future to seek God.
On the last and greatest day of the festival, Jesus stood and said in a loud voice, ‘Let anyone who is thirsty come to me and drink. Whoever believes in me, as Scripture has said, rivers of living water will flow from within them.’ By this he meant the Spirit, whom those who believed in him were later to receive. Up to that time the Spirit had not been given, since Jesus had not yet been glorified
“Come to me and drink!” Jesus was proclaiming himself to be the source, the foundation, the Rock. Big uproar!
Christ is also continually present by the Spirit who lives in us as a river of living water. We can come to him in prayer (speaking to the rock) and find our life. Let’s receive the Holy Spirit.