Wise words I stumbled across from Ben Witherington's Conflict & Community in Corinth, 180, on seeing the church as a family:
"What is desperately needed and seldom found in the church is an adequate theology of the family of faith. Paul believes that being brothers and sisters in Christ and sons and daughters of God transcends all other loyalties and should transform all other social relationships. Blood should not be thicker than the baptismal waters in the church. Rather, Paul calls for a 'relativized' view of all this-worldly institutions, including marriage. His idea of a family 'church' is actualized where God's people treat each other as their primary family, not just as some secondary social gathering that happens once a week and that promotes the agenda of the nuclear family. This is not to say that Paul is against the physical family. He does, however, believe that in the eternal scheme of things one's loyalty to Christ comes above and before one's loyalty to any other group or entity and that therefore one's loyalty to the body of Christ should likewise be at the top of one's priorities."