What kind of wisdom does Paul not speak?

Paul does not speak the wisdom of this world, nor the wisdom of the princes and rulers of this world, which come to naught. Instead, he speaks the hidden wisdom of God, ordained before the world for our glory, among those who are mature.

Les explains that Paul speaks wisdom among the mature, but it is not the wisdom of this world nor of the princes and rulers of this world, which come to naught. Paul is revealing secrets, even the hidden wisdom God ordained before the world to our glory. He contrasts the wisdom of men with the wisdom of God, emphasizing that the world's wisdom is destined to come to nothing.

1 Corinthians 2:6

Howbeit we speak wisdom among them that are perfect: yet not the wisdom of this world, nor of the princes of this world, that come to nought:

Whose wisdom does Paul contrast with the wisdom he speaks?

Paul contrasts the wisdom he speaks with the wisdom of this world—the wisdom of men, not of God. He says he speaks the hidden wisdom of God, ordained before the world, while the wisdom of this world and its princes and rulers come to naught.