Generally when we discuss constructive theological issues, its important to establish the authorities recognized by the participants, be it Revelation, Tradition, Scripture, Reason, or Shared Experience.
In many discussions, both scripture and traditional interpretation of scripture head up the list. Once those authorities are recognized, theological arguments often fall victim to cherry picking of select verses to back up a point.
Recently while looking over a Quaker response to the Lima text (aka Baptism, Eucharist and Ministry, a publication of the World Council of Churches) from the London Yearly Meeting of the Religious Society of Friends, I found a great paragraph in their discussion of that sort of biblical proof-texting: