When Jesus died on the cross he cried out in victory, "It is finished!" He paid the price for the salvation of the world. He opened the door for whoever is willing to enter his kingdom. He fulfilled the primary purpose of his coming into the world, to ensure that "whoever believes may not perish but have everlasting life". But this does not mean he has left us nothing to do to reach the lost. Far from it. In fact, he has commissioned us with that very task, "Go and make disciples of all nations".
Why us? Why not do it without us? Or commission his holy angels to be his evangelistic messengers? The answer in part lies in the power of testimony to the fullness we have received. What does it take for us to reach those around us with the message of Christ? Once we have tasted that abundant life he gives, "we cannot help but speak of the things we have seen and heard". It just flows out of us. That's how the gift of God works in us and through us.
The apostle John records in his Gospel that Jesus attended the Feast of Tabernacles in Jerusalem. On the last day of the feast, Jesus cried out with a loud voice in the Temple and said, "If anyone is thirsty, let him come to me and drink." He knew that nothing, not even the most advanced and developed religion, could satisfy the deepest thirst of the human spirit. Only the cool, refreshing water from the fountain of life himself could quench our spiritual thirst.
That's why we come to him daily and drink. Every time we meet with him and with each other, we drink afresh and are satisfied. But it doesn't end there. Jesus went on to say, "He that believes in me, out of his inmost being shall flow rivers of living water". This is more than drinking to have our own needs met. It means giving to others what we have received, letting that river burst its banks and overflow to the parched ground around us. That includes other thirsty people who are longing for the life that only Jesus can give.