worthy of the calling?

I'm preparing for my devo that I'm teaching tomorrow in SOM, and I'm rockin' Ephesians 4:1 for my text, honestly because it just humbles me. "As a prisoner for the Lord, then, I urge you to live a life worthy of the calling you have received." Today as I was teaching the Bible study (actually it seriously was all God this time), and now reading and thinking about this text, I am honestly just amazed at how we truly are encouraged by Paul to "live a life worthy of the calling", I mean, wow! How can you live up to that? But then again I guess that's where God's grace comes in knowing that there is absolutely no way in my own power that I could be worthy, it's only by His power and His work in my life that allows that, I just hope I will do that some day.