Many times in my life I have been talking with someone about their faith, or mine, or about about Christianity in general and after a while I am amazed at what comes out of my mouth. It is like I have all the right words to say or I am having realizations about things I never thought about. I have, I am happy to say, made a positive difference in at least a couple people's faiths. I credit all of these to wisdom, not of my own but, of the Holy Spirit. Paul writes in this chapter about how those who have the Holy Spirit inside of them have all knowledge. The Spirit understands all that there is to know about God and can teach us things this world can't. The Spirit can give us the power to teach like Jesus, but Paul's warning is that not everyone has the Holy Spirit within them.
1 Cor. 2:14 "14 Some people don't have the Holy Spirit. They don't accept the things that come from the Spirit of God. Things like that are foolish to them. They can't understand them. In fact, such things can't be understood without the Spirit's help."
From this I understand that I must have faith the Holy Spirit knows better than I, because the Holy Spirit is God, and even if I do not see where it is leading me I must trust it. But as always make sure it is the Holy Spirit I am following and not my own desires.