II Corinthians 10:18 “For it is not the one who commends himself who is approved, but the one whom the Lord commends.” Being boastful is not a trait of a Christian.  I am great will never be spoken by one who is thankful for the sacrifice of our Savior.  If Jesus, who was and is indeed Great never boasted that thought of Himself, certainly you and I have less boasting rights and should express and inwardly feel and admit in all humility, we are servants and obedient children of our Heavenly Father and if there is ever glory, it is totally glory given to our Heavenly Father.