When the Structure Preaches the Sermon
A Doctrinal–Structural Analysis of a Sermon on Genesis
6:5–22
Introduction: Sensing the Shape of a Sermon
At first hearing, this sermon appears strong. It is serious
about sin, unashamed about judgment, and willing to speak into the confusion of
the modern world. Yet when we examine its structure, something more revealing
emerges. The issue is not merely what is said, but what governs what is said.
A Strong Beginning: Text and Judgment
The sermon begins well. The text of Genesis 6:5–22 is read
in full. Human wickedness is clearly stated. The preacher does not soften the
language: every inclination of the human heart is only evil all the time. God
is grieved. Judgment is announced. At this point, the sermon stands firmly on
the ground of Scripture.
The Critical Turn: A Framework Takes Control
But then comes the decisive turn. The sermon introduces a
controlling idea: that God created the world with clear distinctions, and that
sin produces chaos by collapsing those distinctions.
This insight is not without merit. It helps illuminate
aspects of Genesis and even resonates with the created order.
The difficulty is not the idea itself, but its role.
From this point onward, the sermon is no longer governed by
the text. It is governed by the framework.
Expansion Without Direction
The sermon expands outward. Creation distinctions are
explored. Cultural applications multiply. Lines between male and female,
Creator and creation, work and rest, truth and error are all examined.
Much of this is vivid and, at points, compelling. Yet
structurally, the sermon has ceased to move forward. It has begun to spread
outward, like a river that loses its banks and becomes a floodplain.
Only later does the sermon return to Genesis 6. But this
return feels like a re-entry rather than a continuation. The flow has already
been broken.
The Second Drift: From Theology to Mechanics
At this stage, one expects the sermon to press into its
theological centre: judgment, grace, covenant, and salvation.
Instead, a second shift occurs. The ark becomes the focus,
but not primarily as a means of salvation. It becomes a problem to solve.
Dimensions are calculated. Animal logistics are explained.
Dinosaurs are addressed. The preacher labours to show that the ark is feasible.
There is a place for such apologetic work. But here it
occupies a disproportionate space. The ark is treated more as an engineering
question than as a theological reality.
The hearer is reassured that the ark could work, but is
given less help to see what the ark means.
A Late Recovery: Theology Returns
Only near the end does the sermon recover its theological
footing.
Noah’s faith is mentioned. Judgment is again brought into
view. The ark is presented as the way through destruction. And finally, Christ
is introduced as the true way of salvation.
This conclusion is sound. But it is also compressed.
The structure has already done its work.
The Real Shape of the Sermon
When we step back, the sermon reveals its true structure:
text → framework → expansion → return → apologetics →
Christ
This is not primarily an expository sermon. It is a thematic
sermon with apologetic appendices and a gospel conclusion.
And this structural pattern explains the doctrinal
imbalances that appear.
Doctrinal Effects of Structural Drift
A Softened Doctrine of Sin
The doctrine of sin is present, but subtly softened. The
illustration of the “bent” bowling ball suggests misdirection rather than moral
ruin. Yet Genesis 6:5 speaks not of deviation but of total corruption.
The human problem is not that we veer off course, but that
we are wholly inclined away from God.
Judgment Without Full Weight
Judgment is affirmed, but its grounding is slightly
displaced. It is explained largely in terms of chaos and disorder rather than
the holiness of God.
The result is that judgment can begin to feel like a
necessary correction of a broken system rather than the righteous response of a
holy God to sin.
Noah: Example More Than Recipient
Noah is presented as a righteous man, which is true, but the
emphasis leans toward his faithfulness rather than the grace he received.
The crucial statement that Noah “found favour” is not
allowed to carry the full weight it should. Noah begins to look like the man
who stood apart, rather than the man whom God graciously set apart.
The Covenant Underdeveloped
The covenant, explicitly introduced in the text, is
mentioned only briefly. Yet this is one of the great structural pillars of the
passage.
God is not merely judging the world. He is preserving His
purposes.
The Ark: Defended More Than Proclaimed
The ark is over-explained physically and under-explained
theologically. It is defended more than it is proclaimed.
The hearer leaves understanding how it worked, more than why
it matters.
Christ: Present but Not Governing
Christ is present, but He arrives late. He is not the thread
running through the sermon, but the conclusion drawn at the end.
Why Structure Matters
All of this is not accidental. It is structural.
Where the sermon gives its time, it reveals its centre.
Here the centre is not quite the covenantal, redemptive
movement of the text, but the explanatory framework of order and chaos.
A banal illustration may help. If a builder spends most of
his time talking about the tools, the measurements, and the materials, you may
end up confident that the house could be built, but you are still standing
outside rather than being invited in.
That is something of what happens here. The hearer is helped
to understand the world, but less fully brought into the refuge that God has
provided.
A Text-Governed Alternative
What would a more text-governed structure look like?
It would move with the passage itself:
Such a structure does not need to be forced. It is already
present in the text.
And when that structure governs, something changes. The
sermon tightens. The doctrine clarifies. And Christ is no longer an added
conclusion, but the necessary end toward which everything moves.
Conclusion: What the Hearer Finally Sees
The concern here is not to diminish what is good in the
sermon. There is much that is earnest, much that is serious, and much that is
true.
But preaching is not only about saying true things. It is
about saying them in a way that allows the truth of the text to set the agenda.
In the end, structure is not neutral. It is theological.
It determines whether the hearer leaves thinking primarily
about:
“Enter through the narrow door.”
