I am currently reading John Eldredge's "Waking the dead". (A great book, by the way). In it, John made a statement which goes something like this, "Most of the 'christian humility' we see today is nothing but shame masquerading as humility".
Somehow, we are just not ready to accept our goodness, the gift we received from God. The shame created by sin, is still impacting our self-image. I think our biggest fear is that, we think if we unleash our goodness, we may become prideful. So to combat pride, we find a way to tie ourselves at the foot of shame. We call it humility and then we act 'humble'. Talk about bondage!
Saint Iraneus's famous quote "The glory of God is man fully alive", in my opinion, is very biblical. After all, Jesus came to give us Life. "I have come that you may have Life", "I am the way, the truth and the Life". It glorifies God when we receive that life and become fully alive. It also glorifies God, when we fearlessly live that life to the full potential. That is not pride. It's living a life which reflects the glory of God. It is living just like who we truly are - "partakers of the divine nature".