"A man wrapped up in himself makes a pretty small package.  But a man, or woman, wrapped up in God is an amazing sight to behold."  (Unknown)

Paul had great confidence. The prefix, "con" means "with" and the root "fid" means faith."  Therefore, a confident person is one who walks in faith.  We walk in faith that we are holy, chosen, redeemed, dearly loved children of God who are empowered by the Holy Spirit, equipped by our Maker, and enveloped by Jesus Christ.  Now that's an unshakable confidence.  

(Sharon Jaynes)

"Not that we are competent in ourselves to claim anything for ourselves, but our competence comes from God.  He has made us competent as ministers of a new covenant" 

(2 Corinthians 3:5-6 NIV).