We sure don’t talk much about the mystery of the Gospel that Paul shares in this passage. Somehow, in our day and time, I believe we see that as a devaluing of the Good News. I believe that apologetics is important. We must be able to logically explain the Gospel. But, on the other hand, a part of it is not explainable, as Paul says here in 2:7:
7 On the contrary, we speak God’s hidden wisdom in a mystery, which God predestined (M) before the ages for our glory.
We speak God’s hidden wisdom. We can lay every rational argument for the Gospel in front of people, but God is the one who opens people’s hearts. Our arguments are a part of the process, but they are never the most important part.