The Doctrine of Mystery

At the end of a chapter full of warnings, Moses writes a sentence that almost everyone reads past, and that should stop us:

"The secret things belong to the Lord our God, but the things that are revealed belong to us and to our children forever, that we may do all the words of this law." (Deuteronomy 29:29, ESV)

There is a line drawn right there, and it splits reality in two. On one side sits what God has hidden, which is his alone. On the other, what he has revealed, which is ours and our children's. A good part of a Christian's peace depends on knowing which side of that line he is standing on. There are things about God we do not understand and never will on this side of eternity: how the Trinity works on the inside, how he sees past, present, and future all at once. And along with those come our own doubts, the questions we are afraid to say out loud. This piece is about what to do with everything that falls on the hidden side of the line.

A God bigger than our minds

The first step humbles and frees in equal measure. God is bigger than our minds, and always will be. This does not come from any confusion on his part; it comes from his being infinite while we are finite. The ocean does not fit inside a cup, and nobody blames the ocean for that.

"For my thoughts are not your thoughts, neither are your ways my ways, declares the Lord. For as the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts." (Isaiah 55:8-9, ESV)

Paul spends three chapters trying to explain God's plans for Israel and, in the end, closes the account with no formula at all. He ends on his knees:

"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?' 'Or who has given a gift to him that he might be repaid?' For from him and through him and to him are all things. To him be glory forever. Amen." (Romans 11:33-36, ESV)

Theology has an old name for this: God is incomprehensible. It is not that we know nothing about him; it is that we never reach the end of him. The knowledge God has of himself is perfect and complete. What we know of him is true as well, only it is always cut to our size. It works like a father talking with a small child: he lowers his words and picks terms the child can follow, or else nothing would fit. What his word teaches us about God is true, yes. Only it is the truth he came down to hand us, not the whole measure of what he is.

"who alone has immortality, who dwells in unapproachable light, whom no one has ever seen or can see. To him be honor and eternal dominion. Amen." (1 Timothy 6:16, ESV)

The line God himself drew

Go back to Moses' verse, because it does more than point at the mystery: it sets the mystery in order. Two territories, each with its owner. What is hidden belongs to the Lord; what is revealed belongs to us. And notice where the sentence lands, the part almost no one reads to the finish: "that we may do all the words of this law."

God did not reveal what he revealed to feed our curiosity. He revealed it so that we would live with him, walk with him, and be saved. And what he gave us covers all of that. On this side of the line nothing is missing that we need in order to know God truly and walk with him to the end. Revelation is no leftover scrap of a larger book that stayed locked away with him; it is exactly what we need, handed over in the measure we can carry.

And what he hid, he hid on purpose. That changes everything. The hidden side of the line is no flaw in the Bible, as if a page had been torn out before it reached us. It is the discretion of a Father who hands his child what the child can hold and keeps the rest precisely because he loves him. When I run into the wall of what has not been revealed, I have not stumbled onto a defect. I have found a limit God himself placed there, with my good in mind.

Where the Bible is silent, curiosity must stop

Now comes the hard part, the one we grasp in theory and slip on in practice. Faced with a mystery, the heart wants to solve it on the spot. It wants to plug the gap with some explanation, any explanation at all, because being left without an answer is uncomfortable. And that is exactly where we need to learn to stop.

Think of the heaviest questions. How can three persons be one God, without turning into three gods and without collapsing into a single person? How does God see past, present, and future at the same time, without time dragging him along the way it drags us? How do God's choice and our will fit in the same place, without one canceling the other? On each of these points the Bible says enough for us to state what is true, and it stays silent about how the thing works on the inside. We can, and must, confess that God is one in three persons, that he is sovereign over all, that he saves by grace. What we cannot do is pretend we understand the machinery and go inventing explanations Scripture never gave.

Stepping past the text is not a sign of deeper faith. Almost always it is the reverse. It is pride dressed up as theology, that same old urge to be like God and know everything (Genesis 3:5), now inside a religious conversation. There is a very old wisdom in admitting this. We do not need to keep trying, out of sheer curiosity, to crack open what sits above our understanding. It is enough to be a disciple of Christ and learn what he shows us in his Word, without the rush to push past that. None of this is mental laziness; it is reverence: seeing that there comes a point where the right question stops being "why?" and becomes "who?".

It was so with Job. He filled heaven with questions, and he had every right to ask them. God answers, only not the way Job expected. Instead of a tidy diagram to explain the suffering, the one who shows up is God himself, and with another question on his lips:

"Where were you when I laid the foundation of the earth? Tell me, if you have understanding." (Job 38:4, ESV)

And in the end Job does not get his "why." He gets God, and for him that already suffices:

"'Who is this that hides counsel without knowledge?' Therefore I have uttered what I did not understand, things too wonderful for me, which I did not know." (Job 42:3, ESV)

To rest before what has not been revealed is also a form of worship. It is to say, together with the psalmist:

"O Lord, my heart is not lifted up; my eyes are not raised too high; I do not occupy myself with things too great and too marvelous for me." (Psalm 131:1, ESV)

Seeking is right; inventing the answer is not

And there can be no misreading of what I have said so far. Stopping where Scripture stops does not ban the seeking, quite the opposite. God wants us to dig deep into his Word, to ask, and to work hard at understanding what he has revealed. The problem is never the seeking itself. It is what we do when the seeking runs into a wall.

When the Bible does not answer, two roads are left. The first is to quiet the curiosity and rest, leaving the answer in God's hands. The second is to chase down material from outside to plug the hole, leaning on what the Bible did not say. It is down that second road that a lot of doctrine is born crooked. The trouble was not the question itself; it was going to look for the answer somewhere else, in another book, in a prophecy, in a strong experience that seemed supernatural. All of it ends up becoming a source of doctrine without ever having been anchored in the Word.

Take a very common example. There are churches that hand demons names, functions, and hierarchies, drawing up a whole org chart of the kingdom of darkness, with who commands whom and who is in charge of what. The thing is, the Bible says nothing of the kind. If Scripture keeps quiet, we have no way to state how demons relate to one another, what rank each one holds or what territory it commands. A doctrine like that is a human invention, made of imagination and of stories about experience rather than of text. The right thing here is exactly what we have already seen: quiet the curiosity and go back to the Bible, saying only what it says, that demons exist, that they are real, and that they were already defeated at the cross.

The principle behind this reaches well past the example. To build doctrine on any base other than Scripture is to miss the mark. It is to set something else in a place that belongs to God's Word alone, the place of final authority. It is no accident that Moses, in the same book our text comes from, had already warned:

"You shall not add to the word that I command you, nor take from it, that you may keep the commandments of the Lord your God that I command you." (Deuteronomy 4:2, ESV)

Paul goes even further. Not even a revelation descending from heaven would have the authority to add anything to the gospel that has already been handed down:

"But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed." (Galatians 1:8, ESV)

"See to it that no one takes you captive by philosophy and empty deceit, according to human tradition, according to the elemental spirits of the world, and not according to Christ." (Colossians 2:8, ESV)

It was through exactly this door that the great deviations walked into history. Rome set tradition and the word of the pope alongside Scripture. The Mormons added the Book of Mormon. The Adventists brought in the writings and visions of Ellen White. Each group has its parallel source, a second voice of authority leaning against the Bible, and it is from that extra source that doctrines spring which the Bible does not teach, when they are not things it flatly rejects. At the root the error is always the same: nobody stopped seeking; they went looking for the answer outside the one place where God promised to speak with authority.

So the discipline runs in two directions. Where Scripture speaks, we listen and obey, however hard it is to swallow. And where Scripture is silent, we do not go importing answers from outside just to plug the hole. Refusing an answer that did not come from the Word of God closes no one's mind; it guards the one source that never deceives.

God is not frightened by your doubts

Now I want to speak directly to whoever carries doubts and still feels afraid because of them. God is not frightened by your doubt. The Bible is full of people who doubted out loud, and he struck none of them down for it. Asaph looked at the easy life of the wicked and nearly lost his footing. He did not pretend everything was fine; he took the doubt to the right place:

"But when I thought how to understand this, it seemed to me a wearisome task, until I went into the sanctuary of God; then I discerned their end." (Psalm 73:16-17, ESV)

Notice the path Asaph took. He did not settle the doubt on his own, chewing it over inside his own head. He carried it into God's presence, into the Word, and there things cleared up. The same happened with that distressed father who came to Jesus unable to believe properly and blurted out the most honest line in the Gospel:

"I believe; help my unbelief!" (Mark 9:24, ESV)

That man did not hide his doubt from Jesus. He confessed the faith he had and the unbelief along with it, and he came close carrying both at once. Jesus did not rebuke him. He healed his son.

But here we have to be precise, because not every doubt travels the same way. There is the doubt that seeks and the doubt that demands. The one that seeks runs to Scripture after the answer where God left it and, when it does not find it, grows quiet and trusts anyway. The one that demands runs the other way, puts God in the dock and insists he give an account before he earns our faith. In the first case, it is a child asking the Father; in the second, it is the creature interrogating the Creator as if it were greater than he is. The first God welcomes with open arms; the second has to be let go of, with repentance. What separates them is the place the person runs to with the question, more than the size of the question itself. So run to the Bible. And if it does not open up the answer, leave the question right there, at the feet of the One who knows.

The mystery that kneels

One confusion is still left to clear up, around the word "mystery" itself. The way we use it, a mystery is a riddle waiting to be solved, the crime the detective has yet to crack. In the Bible's mouth, a mystery is something else: it is what was hidden and that God, at the right time, threw open in Christ. When Paul calls the Trinity, the incarnation, and the salvation of the Gentiles a mystery, he is not speaking of doors still locked; he is speaking of things flung open before our eyes in Jesus.

This changes how we stand before what we do not understand. The greatest questions of the faith, like three persons being one God, or the infinite fitting inside a baby in Bethlehem, are not sums to be worked out at a desk with pen and paper. They are things we bend the knee before. There the right gesture is not to scribble the answer on a sheet of paper; it is to take off your sandals, like someone who realizes he is standing on holy ground. What we cannot measure, we can still love. And to love what is greater than we are may be the sanest thing a creature ever does.

And there is a comfort tucked away at the end of the line. What lies on the hidden side today will not stay hidden forever:

"For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall know fully, even as I have been fully known." (1 Corinthians 13:12, ESV)

The questions that have no answer today are not a threat hanging over us. They are an appointment already set. One day he returns, and much of what is a clouded mirror now will turn into face before face. Until that day comes, faith does not need to understand everything in order to trust. A child sleeps in a moving car with no idea how the engine works, simply because he knows the hands at the wheel. We too can sleep in peace over everything we do not understand, because we know the hands that hold all things together.

The secret things are his. The revealed ones are ours. And what has been revealed to us is enough, not to shut down every question we carry, but to trust the one who holds all the answers.

Ariel Zimbrão