Do nothing out of selfish ambition or vain conceit, but in humility consider others better than yourselves.
(Philippians 2:3, New International Version)
Humility is recognizing who God has made us to be and using that to serve and redeem others. Living in humility as Jesus did, we don't just practice the golden rule, but we go one step better -- we treat others better than we would treat ourselves. Because we're unworthy or unfit? No! Jesus was worthy and glorious, but he counted others better than himself when he sacrificially gave himself to redeem them. It's a high standard. It's a hard standard. It is not for wimps. But it is ultimately glorious (hint, read down through verse 9-10 and remember that the same type of reward will be given to the faithful!).