The first function or operation of the Mind of Christ, produced by the Spirit of the Lord in us, is the Spirit of Wisdom. The Spirit of Wisdom is simply all of God's supernatural Thoughts that He has already placed in our hearts at our new birth. Hebrews 8:10 says that God inscribes or engraves His Word in our hearts. God's Wisdom is His supernatural intelligence-His secret knowledge. God's Wisdom is like a hidden "mystery" that can only be revealed by God's Spirit.
God's Wisdom is not a wisdom of the world, because it can't be bought, it can't be studied for, or earned. There are many highly intelligent men who have exhaustive knowledge of the world's wisdom, but are completely ignorant of God's Wisdom, His Thoughts and His Word. Job 32:9 says, "Great men are not always wise:..."
God's Wisdom is the foundation of our lives and the basis upon which the rest of our spiritual "house" will be built. Proverbs 24:3 validates this when it says, "through wisdom a house is built..." So, whether we realize it or not, God's Word (His Wisdom) must be our sustenance, our nourishment, our food, and our life's bread.