In an Anglican understanding, any baptized person fully belongs to Christ and is part of his church. If that person is baptized as a child, at some point that person will need to come to a personal faith in order to continue to grow in Christ. Personal faith is required to be a living part of the church. The baptized belong first, and we pray that someday they will believe. In my ministry with adults, I have often met people who convert to the community of the church first, and then later convert to the beliefs of the church. They belong before they believe.
