“I did this so you would trust not in human wisdom but in the power of God.” 1 Corinthians 2:5
Paul’s aim for preaching the cross and only the cross was so that everyone could see the power of God. Paul wants everyone to know that it was not by human wisdom that we are saved it is only by the wisdom of God.
He came speaking in simplicity. It is worth noting that Paul had come to Corinth from Athens. It was at Athens that, for the only time in his life, as far as we know, he had attempted to reduce Christianity to philosophic terms. There, on Mars’ Hill, he had met the philosophers and had tried to speak in their own language (Acts 17:22-31); and it was there that he had one of his very few failures. His sermon in terms of philosophy had had very little effect (Acts 17:32-34). It would almost seem that he had said to himself, “Never again! From henceforth I will tell the story of Jesus in utter simplicity. I will never again try to wrap it up in human categories. I will know nothing but Jesus Christ, and him upon his Cross.”
No one can argue against the proof of a changed life. It is our weakness that too often we have tried to talk men into Christianity, instead of in our own lives, showing them Christ. “A saint,” as someone said, “is someone in whom Christ lives again.”
“They were convinced by the power of miraculous signs and wonders and by the power of God’s Spirit. In this way, I have fully presented the Good News of Christ from Jerusalem all the way to Illyricum.” (Romans 15:19)