Humility…consists in an attitude wherein we recognize our own insignificance and unworthiness before God and attribute to Him the supreme honor, praise, prerogatives, rights, privileges, worship, devotion, authority, submission, and obedience that He alone deserves.  It also involves a natural, habitual tendency to think and behave in a manner that appropriately expresses this attitude.  In other words, that attitude of humility is always seen in humble action. 
– Wayne A. Mack (with Joshua Mack)
in Humility: The Forgotten Virtue