Does the church exist to strengthen the family? Sometimes you hear people speak in this way.
The answer to this question is, No, and Yes. No; the church does not exist to strengthen the family. It exists to glorify God, through Christ; and to make disciples. But yes, the process of making disciples does indeed have the savory effect of strengthening the family, in whatever context believers (and hence, church members) are found in family units.
The problem with the assertion that the church exists to strengthen the family is that it supposes, and presupposes too much. It assumes that the family, per se, is somehow inherently worth strengthening. But, is *that* the goal of the Christian ministry? Is it the church's job to "strengthen" just *any* family? Actually, no. Take for instance Osama Bin Laden's family. Here you have a father, a mother, and something like 17 (Osama) siblings. Do we want to "strengthen" *this* family? No. Instead, we want as many members as can be to *leave* this family, and become members of a greater family: the church of Christ.
Of course, all of culture, in whatever realm or situation it finds people in, are aided by the presence of Jesus, as He ministers through His church--and the family is no exception.
But, those that truly love the family, will be careful to focus their greatest attention, not on the family, but on the church.