We teach wisdom to people who are mature, but the wisdom we teach is not from this world. It is not the wisdom of the rulers of this world, who are losing their power.
But we speak God's secret wisdom that has been hidden from everyone until now. God planned this wisdom for our glory. He planned it before the world began.
It is like this: No one knows the thoughts that another person has. Only the person's spirit that lives inside knows those thoughts. It is the same with God. No one knows God's thoughts except God's Spirit.
When we say this, we don't use words taught to us by human wisdom. We use words taught to us by the Spirit. We use the Spirit's words to explain spiritual truths.
People who do not have God's Spirit do not accept the things that come from his Spirit. They think these things are foolish. They cannot understand them, because they can only be understood with the Spirit's help.