In the spring of 2020, when the COVID pandemic hit, churches across the country closed their doors. "That's OK," we were told, "The building is not the church." But if the church is not the building, then what is it? To help us answer this question, in the Bible we have the Great Commission, which is to make disciples, and the Great Commandment, which tells us to love one another. Another helpful source is the Book of Acts, from which we can use the early Church as a model. All of these...