1 Corinthians 3:1-4, 18-20

Dear brothers and sisters, when I was with you I couldn’t talk to you as I would to spiritual people. I had to talk as though you belonged to this world or as though you were infants in Christ. I had to feed you with milk, not with solid food, because you weren’t ready for anything stronger. And you still aren’t ready, for you are still controlled by your sinful nature. You are jealous of one another and quarrel with each other. Doesn’t that prove you are controlled by your sinful nature? Aren’t you living like people of the world? When one of you says, “I am a follower of Paul,” and another says, “I follow Apollos,” aren’t you acting just like people of the world?

Stop deceiving yourselves. If you think you are wise by this world’s standards, you need to become a fool to be truly wise. For the wisdom of this world is foolishness to God. As the Scriptures say, “He traps the wise in the snare of their own cleverness.” And again