For the wisdom of this world is foolishness with God. For it is written, he taketh the wise in their own craftiness.
1 Corinthians 3:19 (KJV)
Let us be careful to place our faith only in the power of God, and not in what we might consider the wisdom of this world. In other words, we believe because we know that God is faithful to His Word. We believe because we know that God is watching over His Word to perform it. Wordly wisdom will oftentimes try and get us to doubt the promises of God, yet we are called to realize that no amount of worldly limitation can prevent us from receiving what God has already promised us in His Word.