“That there should be no schism in the body; but that the members should have the same care one for another. 26And whether one member suffer, all the members suffer with it; or one member be honoured, all the members rejoice with it.” I Cor. 12:25-26
It is in the nature of Christ to care for others. If I belong to a fellowship of believers, then there will be many others I can care for. There will also be others that will care for me. Those that are independent of the church, for the most part, only have to care for themselves and their family.