1 Corinthians 3:1-3

Brothers and sisters, in the past I could not talk to you as I talk to spiritual people. I had to talk to you as I would to people without the Spirit—babies in Christ. The teaching I gave you was like milk, not solid food, because you were not able to take solid food. And even now you are not ready. You are still not spiritual, because there is jealousy and quarreling among you, and this shows that you are not spiritual. You are acting like people of the world.