“But whoever drinks of the water that I will give him will never be thirsty again. The water that I will give him will become in him a spring of water welling up to eternal life.” John 4:14
“O God, you are my God; earnestly I seek you; my soul thirsts for you; my flesh faints for you, as in a dry and weary land where there is no water.” Psa 63:1
“`There is provision in Christ for the satisfaction and full contentment of the needy and thirsty soul. This is the sense of those words in the text,” as rivers of water in a dry place,” in a dry and parched wilderness, where there is a great want of water, and where travelers are ready to be destroyed with thirst, such as was that wilderness in which the children of Israel wandered. This comparison is used elsewhere in the Scriptures. Psalm lxiii. 1. “O God, thou art my God; early will I seek thee: my soul thirsteth for thee, my flesh longeth for thee in a dry and thirsty land, where no water is.” Ps. cxliii. 6. “I stretch forth my hands unto thee; my soul thirsteth after thee, as a thirsty land.” Those who travel in such a land, who wander in such a wilderness, are in extreme need of water; they are ready to perish for the want of it; and thus they have a great thirst and longing for it.
It is said that Christ is a river of water, because there is such a fulness in him, so plentiful a provision for the satisfaction of the needy and longing soul. When one is extremely thirsty, though it is not a small draught of water that will satisfy him, yet when he comes to a river, he finds a fulness, there he may drink full draughts. Christ is like a river, in that he has a sufficiency not only for one thirsty soul, but by supplying him the fountain is not lessened; there is not the less afforded to those who come afterwards. A thirsty man does not sensibly lessen a river by quenching his thirst.
Christ is like a river in another respect. A river is continually flowing, there are fresh supplies of water coming from the fountain-head continually, so that a man may live by it, and be supplied with water all his life. So Christ is an ever-flowing fountain; he is continually supplying his people, and the fountain is not spent. They who live upon Christ, may have fresh supplies from him to all eternity; they may have an increase of blessedness that is new, and new still, and which never will come to an end.”*