"...If anyone thirsts, let him come to me and drink. Whoever believes in me, as the Scripture has said, 'Out of his heart will flow rivers of living water.'" John 7:37-38
"The fulfillment of . . . the promise could be testified by thousands of living Christians in the present day. They would say, if their evidence could be collected, that when they came to Christ by faith they found in him more than they expected. They have tasted peace and hope and comfort since they first believed, which, with all their doubts and fears, they would not exchange for anything in this world. They have found grace according to their need and strength according to their days. In themselves and their own hearts they have often been disappointed, but they have never been disappointed in Christ."
J. C. Ryle, Expository Thoughts on the Gospels: John 1:1 through John 10:9, page 472.