When I was starting out in apologetics, I used to make every effort to try to make myself seem well-educated, well-versed in the scientific and philosophical arguments that my unbelieving discussion partners would find impressive.
I thought this would make them give the Gospel a fairer hearing (and score points for my own reputation).
As I began to learn more, however, I realized that it’s not my words that matter, but God’s. Now I incorporate as much Scripture as I can into my apologetics—not to show off my biblical prowess but because that’s where the power comes from.
I don’t have it all figured out yet, but I’m working hard to let the Scriptures shape my “verbal life” in the sphere of defending the faith, as Doug Wilson recommends here.