1 Corinthians 1: 18-31
The first battle between faith and human reason took place in the garden of Eden. Spurred on by the lies of the serpent, Eve began to look at her situation from a purely logical perspective and decided she was being cheated by God out of something good. Her faith faltered as "reasonable" thoughts of self-interest filled her mind.
I am not saying that the way of faith is never logical, but by operating only on the basis of reason, a conflict with the Lord is inevitable. The reason is that His instructions and actions don't always appear reasonable from a human perspective. Although Isaiah 55:8-9 describes God's thoughts and ways as higher than man's, many people judge divine ideas to be lower than human intelligence.
Paul emphasizes this when he points out that God's choices are illogical by the world's standards. His message of salvation seems foolish, and His messengers appear weak and unimpressive. In an age that thrives on recognition, admiration, and importance, a person who believes the Bible is considered a weakling in need of a religious crutch to cope with life. While this description is given in derision, it's actually quite accurate. Recognizing their helplessness, believers lean on Christ so He can raise them to stand with Him in righteousness.
That day in Eden, sin and self-importance entered the human heart. But all the worldly wisdom that fuels our pride is nullified by God. He is looking not for great and impressive people but for weak, humble servants who can boast only in Christ. The Savior alone is their strength and wisdom.