What does it mean that God is incomprehensible?

Theologians have a specific word for one of God's core attributes: incomprehensibility. At first hearing, it can sound bleak, as though it means God is simply beyond reach, a mystery we should not even bother approaching. That is not what the term means at all. Incomprehensibility is not a statement about God's distance; it is a statement about His size relative to ours. David captures it in worship rather than despair: "Great is the Lord, and greatly to be praised, and his greatness is unsearchable" (Psalm 145:3).

The classic theological distinction here is between comprehending God and apprehending Him. To comprehend something means to grasp it completely, exhaustively, with nothing left over. To apprehend something means to grasp it genuinely and truly, even if only partially. You cannot comprehend the ocean by filling a cup with seawater, but the water in that cup is truly, authentically ocean water. In the same way, we cannot comprehend God, but what we know of Him through His Word is truly, authentically knowledge of God, not a lesser substitute.

This distinction protects two truths at once: God is genuinely knowable, and God is never fully knowable by any creature. Both are necessary, and losing either one leads to error.

God's incomprehensibility follows directly from His infinity. Paul's doxology in Romans puts it plainly: "Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgments and how inscrutable his ways! For who has known the mind of the Lord, or who has been his counselor?" (Romans 11:33-34). A being without limit cannot be fully contained by a mind that has limits in every direction, memory, attention, lifespan, and intellect alike.

This is simply built into the difference between Creator and creature. Even in a perfect, sinless eternity, we will remain finite beings forever; incomprehensibility is not a problem caused by sin that will eventually be fixed. It is a permanent, appropriate feature of what it means to be a creature in relationship with an infinite God.

It would be a serious mistake to slide from "God is incomprehensible" into agnosticism, the idea that we therefore cannot really know anything true about Him. Scripture never draws that conclusion. John writes that the Son "has made him known" (John 1:18), and Jesus states that eternal life consists precisely in knowing God and the One He sent (John 17:3). God has spoken clearly in Scripture and supremely in Christ, and what He has revealed is not a fog of vague impressions but real, trustworthy, life-changing truth.

The doctrine of the Trinity is a good illustration of incomprehensibility in action. Scripture clearly reveals that God is one in essence and three in person, and we can state that truth accurately, defend it, and build our lives on it. But no human mind can fully picture or exhaustively explain how three-in-oneness actually works within God's being. We know the truth is real without being able to fully comprehend its inner mechanics, which is exactly the pattern incomprehensibility predicts.

Rather than causing anxiety, God's incomprehensibility should produce settled humility and unending wonder. It means you will never exhaust the study of God, not in this life and not in eternity to come. Every new depth of Scripture, every fresh experience of His grace, every answered prayer will reveal a little more of a God who never runs dry. That is not a discouraging thought; it is one of the most hopeful truths in all of theology, a lifetime, and forever, of discovering more of a God who is always, endlessly, more than we have yet seen.

This should also soften how we treat theological disagreement among fellow believers. If even faithful, careful readers of Scripture cannot fully comprehend God, some humility is warranted when we wrestle with one another over secondary questions His Word leaves less than fully explained. Confidence in what God has clearly revealed and humility about what He has not are meant to coexist, not compete.

Think of the wisest, most learned theologian who has ever lived, someone who has spent sixty years studying Scripture day and night. Even that person, at the end of a long life, would tell you they have only begun to see the edges of who God is. That is not a failure of scholarship; it is simply what it means to be finite in relationship with the infinite. Far from being discouraging, this is an invitation: there will never come a day, in this life or the next, when you have learned all there is to learn about God, which means the adventure of knowing Him truly never has to end.