Note that in Ephesians 4:16, Paul is bringing together a number of themes he has explored in the first three chapters. It seems to me that here Paul is examining in some detail the relationship between the individual believer and his gifts and the Church (I am using the capital C here to refer to the Body of Christ as a whole, not a local church.) Note the integration of the two concepts in Paul. The Body is held together by the individual gifts and contributions of the individuals. The Body does not exist apart from the individuals. Yet as we have already noted above in 1:23 Paul refers to the Body as the fullness of Christ.
Think through that. The fullness of the Body of Christ is held together and grows by the proper working of each individual in that Body. That throws and entirely different and blinding light on yesterday’s post and our responsibility to engaged completely in what Paul says in 2:10 are the good works for which God prepared each believer.