These reformers came from diverse academic backgrounds, but later distinctions within Reformed theology can already be detected in their thought, especially the priority of scripture as a source of authority.
Scripture was also viewed as a unified whole, which led to a covenantal theology of the sacraments of baptism and the Lord's Supper as visible signs of the covenant of grace.
Who are the people that want to be treated as members here? So for all those reasons, even though there's no sentence in the Bible that says, "There is such a thing as church membership, and thou shalt be a church member," I think it's implied in the nature of the church and of Christian discipleship that everybody should, by a covenant commitment of some kind, put their name on the line saying, "I'm here.
It's very hard to do what the Bible calls a church to do unless it knows who are the members and who aren't. " And I think a lot of people don't want to be in anything because they don't even like the idea of being able to be put out of something. But that's not even a clear word—what does "member" mean? I think the answer is that you should be a church member.There's global membership in the body universal, and there's local membership in the body where I'm a finger or an eye or an ear or a foot. So the word "member" in 1 Corinthians 12-14 means you're part of a local organism, and the finger belongs.It should care about what happens to the eye, and the eye what happens to the finger.