In the medical community collaboration amongst various professionals (nursing, diagnostics, primary care, specialist, emergent care, ect) is well coordinated and highly effective approach to helping people. Every part of the system is working towards the same purpose, caring for the person, and utilizing a shared understanding of the body. Yet, if any one part of the team tried to do all the work, they would not only find themselves overwhelmed, but patients would be poorly served.
We see this to be true within the organism of the body of Christ as well. In the Old Testament, Exodus 18, we read about Moses trying to serve all the people God had given him responsibility for, by himself. Fortunately, his father-in-law talked some sense into him saying “You cannot do this job by yourself. It wears you out. And it makes the people tired too.”
In the New Testament the disciples recognized the need to divide up responsibilities, delegating certain tasks to elders and deacons (Acts 6). Paul encouraged Timothy in the appointing of overseers in the church to share the load in caring for the people (1 Tim 3). In Ephesians Paul explains that God has given to the body as gifts people of varying talents and callings to build up the body into full maturity, by speaking the truth in love (Eph 4). As all the parts of the body work together, empowered by the same Spirit, to honor our King and serve one another, the body is strengthened and grows into maturity (1 Cor 12).