"However, we speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing. But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory" (1 Corinthians 2:6-7)
God expects you to constantly renew your mind with the Word so that you can think, talk, and live the higher life in Christ. In this higher life, we speak wisdom, and the wisdom of God is the Word of God.
For example, you may be feeling stressed or overwhelmed, but you affirm, "I have the life of God in me!" The people of the world and the spiritually immature can't understand this kind of talk; they don't understand the wisdom of God that we speak because it's not in their plane.
Consider this: God said to Abraham, "No longer shall your name be called Abram, but your name shall be Abraham; for I have made you a father of many nations" (Genesis 17:5). Abraham knew that those words were the wisdom of God because it was naturally impossible for him to have a child, being almost 100 years old, with an equally old and barren wife.
Despite all of this, Abraham immediately aligned his confession with the wisdom of God and started introducing himself to everyone with his new name, Abraham, which means "father of many". He didn't care if the people laughed at him; he maintained his confession of God's wisdom, and sure enough, Isaac was born.
As you meditate on God's Word, continue to declare the things He has said concerning you, no matter what the natural circumstances look like. It makes no difference if the theorists have said that that disease is incurable-- keep affirming, "Christ is my life! Christ makes me whole! Christ makes me sound! Christ in me means divine health! His divine presence makes me indomitable, refreshed, invigorated, and energized."
Do this every day, interjecting it with speaking in tongues. I guarantee you, that sickness will pass out of your body in no time. Hallelujah!
I'm what God says I am! I'm like a tree, planted by the riverside, producing fruits in and out of season! I'm more than a conqueror, because the Greater One lives in me. Christ is my life, and His glory is revealed in and through me. Hallelujah!
Further Study: 1 Corinthians 2:4-7