Here is a profound and thought provoking quote from the forthcoming book Christ Our Life by Michael Reeves:
When Christians define themselves by something other than Christ, they poison the air all round. When they crave power and popularity and they get it, they become pompous, patronizing, or simply bullies. And when they don’t get it they become bitter, apathetic or prickly. Whether flushed by success or burnt by lack of it, both have cared too much for the wrong thing. Defining themselves by something other than Christ, they become like something other than Christ. Ugly.
Our union with Christ thus has deep plough-work to do in our hearts. It automatically and immediately gives us a new status, but for that status and identity to be felt to be the deepest truth about ourselves is radical, ongoing business. That is the primary identity of the believer, though, and the only foundation for truly Christian living. For our health, our joy and fellowship, then, we must take up arms against the insidious idea that we have any identity — background, ability or status — more basic than that of sharing the Son’s own life together before the Father.