Getting into the Weeds of Church Membership and Baptism with Bobby Jamieson and Jonathan Leeman

What is baptism? What does baptism mean? Is it simply an individual's declaration that they now belong to Jesus? Is it a sign and seal of the new covenant, just as God intended circumcision to be a sign and seal of the old? And what does all of this have to do with church membership? Is church membership for everyone? Only baptized believers? Baptized believers and their children?