“It is not that we think we are qualified to do anything on our own. Our qualification comes from God” (2 Corinthians 3:5 NLT).

NOT SELF-CONFIDENCE BUT CONFIDENCE IN GOD
Paul did not want the Corinthian believers to think that his confidence came from any strengths or abilities of his own, but that it came from confidence in God. Paul claimed no self-sufficiency, no self-confidence and no self-empowerment. His calling, message, and authority all came from and continued to be empowered by the Lord. Although Paul claimed the Corinthians as his “letters of recommendation” (2 Cor. 3:1), he wanted to make it clear that the true author was God Himself, and Paul, merely the pen in God’s hand.
 
Our modern emphasis on self-esteem and self-confidence find little basis in biblical Christianity. In fact, God often allows circumstances to come our way that tear down our self-confidence, so that we might learn to place our confidence in God alone. Didn’t old Paul have to experience blindness on the road to Damascus before he could truly see?
 
When we esteem Christ above all others, especially ourselves, we find our true identity and value in Him. And when we put our confidence in God alone, we find ourselves qualified for any task or role that He calls us to fulfill.