Mitch Stokes has written a great piece for crossway.org.
Dr. Stokes is a senior fellow of philosophy at New St. Andrews College in Moscow, Idaho earning his PhD from the University of Notre Dame under the guidance of Alvin Plantinga. Stokes also holds degrees in religion and mechanical engineering, and holds five patents in aeroderivative gas turbine technology. His most recent book is How to Be an Atheist: Why Many Skeptics Aren’t Skeptical Enough.
Here is a short taste of the article:
1. Apologetics is as much for believers as it is for unbelievers.
Let’s roughly define apologetics as the use of arguments to remove doubt or unbelief (I’ll qualify this in the next point). The point here is that unbelief often comes from our own hearts and minds, despite the fact that we’re Christians. For my own part, apologetics has always been something I do as much for me as for others.
2. Apologetics can be used preemptively.
Here’s the qualifier I mentioned above: although we often use apologetic arguments to remove doubts, we can also use them to prevent doubts. Teaching apologetics to young believers can be a preemptive strike on unbelief.