True wisdom, brethren, is the result of human reason coupled with revelation. But even true wisdom will result only if a person believes what God says. Then, you see, the person has the opportunity to see God. And it is hidden from those who put their faith in human wisdom.
Natural in this context (verses 13-15) does not mean evil. It simply refers to a person whose horizons are bounded by the things of natural life - by the around and the about. Such a person is not equipped to discern the activities of God. But a person with the Spirit of God can examine that area and scrutinize so as to judge. Therefore, you see, in his judgment God comes into the picture. And, when the Spirit of God comes into a person's life, the basis of his judgment should change! It is not because the person is any greater or better, but because the Spirit of God equips that person to see and to use the wisdom of God, because now he can judge all things from God's perspective. That is our responsibility!
Brethren, because we have been given this calling, we should see God so clearly and know His greatness so intimately that we can live in the expectation that something great can happen at any moment to those who are receptive. Brethren, the God who raised up Jesus is equal to any occasion - any possibility! Is there anything that is too great for Him? Nothing! He throws that challenge out to man - to those who see Him.