1. What it is that the soul of every man naturally and necessarily
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 travellers 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 63:1. "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." Psalm 143:6. "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 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.
In illustrating this second proposition, I shall inquire,
1. What it is that the soul of every man naturally and necessarily craves.
First. The soul of every man necessarily craves happiness. This is an universal appetite of human nature, that is alike in the good and the bad; it is as universal as the very essence of the soul, because it necessarily and immediately flows from that essence. It is not only natural to all mankind, but to the angels; it is universal among all reasonable, intelligent beings, in heaven, earth, or hell, because it flows necessarily from an intelligent nature. There is no rational being, nor can there be any, without a love and desire of happiness. It is impossible that there should be any creature made that should love misery, or not love happiness, since it implies a manifest contradiction; for the very notion of misery is to be in a state that nature abhors, and the notion of happiness, is to be in such a state as is most agreeable to nature.
Therefore, this craving of happiness must be insuperable, and what never can be changed; it never can be overcome, or in any way abated. Young and old love happiness alike, and good and bad, wise and unwise; though there is a great variety as to men's ideas of happiness. Some think it is to be found in one thing, and some in another; yet, as to the desire of happiness in general, there is no variety. There are particular appetites that may be restrained, and kept under, and conquered, but this general appetite for happiness nev-er can be.
Secondly. The soul of every man craves a happiness that is equal to the capacity of his nature. The soul of man is like a vessel; the capacity of the soul is as the largeness or contents of the vessel. And therefore, if man has much pleasure and happiness, yet if the vessel is not full, the craving will not cease. Every creature is restless till it enjoys what is equal to the capacity of its nature. Thus we may observe in the brutes; when they have that which is suitable to their nature, and proportional to their capacity, they are contented. Man is of such a nature, that he is capable of an exceedingly great degree of happiness; he is made of a vastly higher nature than the brutes, and therefore he must have vastly higher happiness to satisfy. The pleasures of the outward senses which content the beasts, will not