All of us are theologians - we all think about God, have some conception of what the future holds, try to articulate what's wrong with us (and around us), and more.
So why is theology important? Because we all do it. We're ALL theologians.
Few people capture this as well as C.S. Lewis. Listen to what he says:
Everyone has warned me not to tell you what I am going to tell you… They all say 'the ordinary reader does not want Theology; give him plain practical religion.' I have rejected their advice. I do not think the ordinary reader is such a fool. Theology means 'the science of God,' and I think any man who wants to think about God at all would like to have the clearest and most accurate ideas about Him which are available. You are not children: why should you be treated like children? "Theology is practical. 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. It will mean that you have a lot of wrong ones – bad, muddled, out-of-date ideas. For a great many of the ideas about God which are trotted out as novelties today, are simply the ones which real Theologians tried centuries ago and also rejected. To believe in the popular religion of modern England [or America] is retrogression – like believing the earth is flat."
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