Every soul thirsts. This thirst may not be obvious in every moment, but at some point and to some degree every soul thirsts after something, something it does not have. We are rarely content in our current condition, rarely content just the way we are. But while we all thirst, we do not all thirst in the same way. Donald Whitney’s book Ten Questions To Diagnose Your Spiritual Health  has much to say about this. Whitney identifies 3 ways in which our souls thirst.
The soul of the unbeliever is empty toward the things of God. Until the Spirit fills the soul with his presence, it is devoid of any love for God. Without God, the unbeliever is constantly looking for something, anything. But he is unable to fill the emptiness. This is something many people do not understand, but something the Bible teaches clearly: While the believer’s soul is empty because he does not know God, he does not and cannot seek to fill it with God. Many people believe that unbelievers are truly seeking after God but unable to find him. The Bible tells us, though, that the empty soul is unable to understand or satisfy this thirst. Not only that, but the empty soul does not want to understand this thirst, and would not, even if it were possible. The empty soul is completely and fully opposed to God; it is deceitful and desperately wicked. As Paul writes in Romans 3:11, quoting David, “no one understands; no one seeks for God” (Psalm 14:2).
Thus the empty soul is left seeking to be satisfied by other things, fleeting things, good things and bad things. It seeks satisfaction in work, family, love, sex, money and everything else the world has to offer. It may seek satisfaction in religion and even the Christian faith, but it never truly seeks God and thus never truly finds him. Until the Holy Spirit enables that soul to understand the source of his thirst and enables him to see the One who can satisfy, he will continue to look in vain. “Just because a man longs for something that can be found in God alone doesn’t mean he’s looking for God,” says Whitney, “Many who claim they are questing for God are not thirsting for God as he has revealed himself in Scripture, but only for God as they want him to be, or a God who will give them what they want.”
The first is by drinking too deeply from the fountains of the world and too little from the river of God. When a believer drinks too much of what the world has to offer and too little of what God offers, his soul becomes parched. Giving himself over to his sin means he has turned his back on God, even if only for a while. He has allowed his soul to run dry.
The second way a believer can become arid is what the Puritans referred to as “God’s desertions.” There are times in life when God’s presence is very real to and other times where the Christian feels only his absence. The Christian knows that God’s absence is merely a matter of perception and that there is never a time where he actually withdraws. However, there are seasons in which he removes from his children a conscious knowledge of his presence.
The third way a believer becomes arid is fatigue, either mental or physical. Becoming burned-out by the cares and concerns of the world will cause a believer to focus too much on himself, thus turning his thoughts away from God.
The dry soul yearns for God and nothing else will satisfy. This soul has tasted God, it has seen God, and it wants nothing more than to return to being close to him. And when the soul is dry, God is faithful and good to provide the nourishment the soul desires. He fills, he restores and he satisfies.
The final type of spiritual thirst is the thirst of the satisfied soul. The satisfied soul desires God precisely because he is satisfied in him. There are many biblical examples of this, but perhaps one of the clearest is the apostle Paul who, in Philippians 3, went to great lengths to describe the depth of his relationship with Christ, but then added the words “that I may know him.” His satisfaction in Christ and the deep love and affection he felt for God only stimulated his desire to know him more. Paul wanted nothing more than to know and love God. His satisfaction made him thirsty for more. Thomas Shepard wrote “There is in true grace an infinite circle; a man by thirsting receives, and receiving thirsts for more.” This is not a cycle of frustration, where the Christian continually laments that he does not know more, but a cycle of satisfaction and earnest desire.
Let me close with a prayer of A.W. Tozer. “O God, I have tasted Thy goodness, and it has both satisfied me and made me thirsty for more. I am painfully conscious of my need for further grace. I am ashamed of my lack of desire. O God, the Triune God, I want to want Thee; I long to be filled with longing; I thirst to be made thirsty still.” Amen! It is my desire, and the desire of all who believe and thirst after God, that we may be filled with longing to long after God, and to thirst that we may be thirsty still. God grant that we may be men and women who, being satisfied, thirst for him!