While all of this is so good, there's something about that last sentence that feels over-the-top. The wording "sharing together the grace of God" calls to mind wine connoisseurs remarking over flavor notes as they sample in the grace of Jesus. "Mmmm, can you believe His incalculable riches?" ... "Yes, but how about the glory of His presence; it's available all the time?"
May we become those ones who share together the flavorful, overwhelming vintage of His ever-present abundant grace! May we be less concerned with "defending" our Belief than with "demonstrating" its power by the might of He who lives in us! The power of Jesus is its own best apologetic! His grace is sufficient for you...and all you meet!