Wayne Grudem on Systematic Theology, and Why It Matters

By Wayne Grudem February 11, 2019

I’ve shared before my appreciation for Wayne Grudem, who is the author of more than twenty books and a research professor of theology and biblical studies at Phoenix Seminary. Several years ago, he and I both spoke at the Clarus Conference, and did a couple of panel discussions together. I really enjoyed my time with him.

A few years ago Wayne shared that he had been diagnosed with Parkinson’s disease, and you can read his godly response to this news which he shared on Desiring God.

I’ve long recommended Wayne’s books on theology, and cannot emphasize enough the importance of learning systematic theology. Based on conversations I’ve had, I fear that many believers in churches today understand very little Bible doctrine. I want to encourage you to discover the joy of learning. I recommend not only Wayne Grudem’s large Systematic Theology, but also his abridged Bible Doctrine.

This article from him is a great introduction to what systematic theology is, and why it matters. —Randy Alcorn

What’s Systematic Theology and Why Bother?

By Wayne Grudem

Systematic theology means answering the question: “What does the whole Bible say to us today about any given topic?”

It means searching the Bible to find all the verses pertaining to a given topic of study. Then, we put all the verses together to understand what God wants us to believe. “Systematic” means “carefully organized by topics.” Thus, it’s different from random theology or disorganized theology.

You’re a Theologian

Even if you haven’t written a systematic theology—or even if you don’t consider yourself a theologian—you’re still doing systematic theology in some sense. Everyone has beliefs about who God is, who Jesus is, what salvation is, and how we should live as Christians. We’re all synthesizing those beliefs together.

So if you’re a Christian, you’re doing systematic theology, whether you’re aware of it or not. If you’re not aware of it, then your theology may not be very well organized, or it may not take into account verses from the whole Bible. There may be a verse here or there, or from certain parts of Scripture, but it’s not the entirety of what God reveals about a particular doctrine.

That’s why it’s important to study systematic theology—to understand what God says and what the Bible says.

How to Study Systematic Theology

Here are five ways we should approach systematic theology:

1. With prayer.

We should imitate the psalmist, who prays, “Open my eyes, that I may behold wondrous things out of your law” (Ps. 119:18).

2. With humility.

Both Peter and James say God resists the proud and gives grace to the humble. Of those two categories of people, I think we all want to be among those to whom God gives grace.

A word of caution is appropriate: Be careful when you talk with others about theological topics, that you don’t let your temper run wild. That isn’t the way God wants us to talk about him:

The wisdom from above is pure, peaceable, gentle, open to reason, full of mercy and good fruits, and the harvest of righteousness is sown in peace by those who make peace. (James 3:17)

We must study systematic theology with humility and seek peace with others.

3. With reason.

Contradictions aren’t acceptable in the study of systematic theology, since there aren’t any contradictions in the Bible. 

Psalm 119:160 says “the sum of your words is truth.” The sum—when you put all God’s words together. There are many times we need to acknowledge mystery, paradox, and things we can’t fully understand. But that’s different from saying there’s a contradiction. God never asks us to believe a contradiction.

4. With help from others.

I have learned much about theology through conversations with others—in the library, in the hallway, or in the seminary lunchroom when talking with other students. Seek help from others as you study.

We use help from others when we read books on theology, since God has gifted the church with teachers (1 Cor. 12:28). We can learn about him from them.

5. With rejoicing and praise.

There should be joy in our hearts as we study these topics, and it should result in praise to our King.

Psalm 139:17 says, “How precious to me are your thoughts, O God. How vast is the sum of them.” The psalmist is overwhelmed with joy and praise for what God has revealed about himself and his deeds. This should be our response as well.

Why Study Systematic Theology

Studying theology is one of most important things we can do, since there is a relationship between what we believe and how we live.

Bible DoctrineThe Bible speaks of doctrine that accords with godliness. For example, Paul encourages the Ephesian Christians to grow up into Christ so they won’t be tossed by every wind of doctrine, but will have stability and grow into maturity (Eph. 4:14).

On the other hand, if false teaching comes into the church—if people lose sight of true theology—then it can be harmful and turn people away from the faith. Paul warned the elders at the church in Ephesus:

For I have not hesitated to proclaim to you the whole will of God. Keep watch over yourselves and all the flock of which the Holy Spirit has made you overseers. Be shepherds of the church of God, which he bought with his own blood. I know that after I leave, savage wolves will come in among you and will not spare the flock. Even from your own number men will arise and distort the truth in order to draw away disciples after them. (Acts 20:27–30)

Paul warns that false doctrine would come from believers within the church who adopt wrong teachings and are destructive in their influence. Damage comes from neglecting theology and allowing churches and organizations to stray into false teaching about the truths of God’s Word.

Studying systematic theology is important. We should do it with intentionality and purpose.

This post originally appeared in its entirety on The Gospel Coalition.

Photo by madeleine ragsdale on Unsplash