His wisdom!

"God did not save the world through its own wisdom. It was not through cleverness or wisdom or intelligence that anyone has come to Christ, including any of us. It is often tempting to think that we were simply smart enough to understand this gospel. When the gospel was preached, we were intelligent enough to grasp it, smart enough to recognize it for what it was. As tempting as such thoughts may be, however, none of us came to the gospel by intelligence. We came because of God's power working in "the foolishness of the message preached."