A discovery group in a household of peace is not the church, yet. It is an existing community that desperately needs the gospel to become a Kingdom outpost. When discovery happens there, these people experience God through the Holy Spirit at work in the Word and their exploration of it together. As a household of peace comes to faith, each will be discipled toward repentance, full loyalty and maturity.
The question reveals that we have made participating in church gatherings the only avenue for coming to know God and surrendering to him. Facilitating a Discovery Group in your own home, among your family and friends can become a pathway for introduction to the church.
When you read the four books called Gospels, ask yourself the following question: “When do the disciples qualify as being full-fledged believers?” When are they “the church”? We see moments when they appear to “get it.” There are times when they confess Jesus as Lord, but then almost immediately tell him he is wrong (Matthew 16). When would your church leadership give them “responsibility in the church?” Obviously, Jesus sent them out earlier (Matthew 10:1ff). Jesus’ actions in the four Gospels needs to become our model, if we are going to see multiplication begin.
An acorn has all the DNA for an oak tree. It cannot be used to manufacture wood flooring or turning a wood bowl, but its DNA is present. Discovery Groups have the spiritual DNA to form churches. There is much that has to happen before they reach that stage of development and maturity, but trees only come from seeds. Biblical churches come from the Word of God being sown in the hearts of men and women. The questioner needs to differentiate between seed sowing and harvesting.