Every Christian family and church should have a plan of discipleship aimed at equipping the people of all ages to know what they believe and why, and how to articulate those beliefs. We must also aim for life transformation as a result of those truths.
If groups are to maximize their effectiveness, getting assimilated into the life of the church is just one component. Groups need to be part of the disciple making process. It is helpful to keep in mind that we want group members to be involved in the full orbit of life in the congregation.
We do know that God has called us to be salt and light, and as part of His church, to represent His truth and kingdom in all of life. We also know from Scripture, as well as from practical experience that as individuals and as churches, we can be more effective together than alone.