In other words, Theology is practical: especially now.
In the old days, when there was less education and discussion,
perhaps it was possible to get on with a very few simple ideas about God.
But it is not so now. Everyone reads, everyone hears things discussed.
Consequently, if you do not listen to Theology, that will not mean
that you have no ideas about God [i.e., theology].
It will mean that you have a lot of wrong ones —
bad, muddled, out-of-date ideas.
— C.S. Lewis
Theology rightly understood is not a tangential part of Christian faith; it is the source, strength, and substance of vibrant faith. As A. W. Tozer famously said, “What comes into our minds when we think about God is the most important thing about us” (Knowledge of the Holy, 1). This is the core of theology—thinking God’s thoughts after him. And true theology is thinking biblically-informed thoughts about God. Theology is not an academic discipline consisting of esoteric terms, but sound doctrine that gives life and strength to every child of God made alive in Christ.
Sadly, this way of thinking about theology is often missed. Even among pastors, those called to instruct in sound doctrine, there is a sense in which theology is secondary to the real work of the ministry. Evangelism, discipleship, worship services, and church growth are elevated above “theology,” but only because they assume that each discipline and practice of the church is a-theological. In the short run, such doctrinal inattention may not create observable problems, but in the long run it will.
Paul understood this and that is why he writes in 1 Timothy 4:16: “Keep a close watch on yourself and on the teaching. Persist in this, for by so doing you will save both yourself and your hearers.” Faithful shepherds and growing sheep follow Paul’s model and give appropriate emphasis to theology as it informs and energizes spiritual life. In fact, close attention to the New Testament shows that wherever the apostles are giving practical instruction, they are doing so from deeply theological wells.