Sacraments are "Means of Grace," which signifies that God uses these material means to work his grace in us. This definition helps us understand Baptism and the Lord's Supper and grow in our faithful use of them.
Church Order may not bind consciences, man may not innovate in our worship or governance of God's people.
"Render unto Caesar the things that are Caesar's" is one of Jesus's clearest statements on the church's relation to the civil magistrate.