'This fasting...is very good, provided the commandments of the Lord be observed...First of all, be on your guard against every evil word, and every evil desire, and purify your heart from all the vanities of this world. If you guard against these things, your fasting will be perfect.' - The Shepherd of Hermas
This is a message directed primarily to charismatic Christians who focus so much on "the dove," that they miss the cross. Katz explains that ecumenicism is impossible. Unity is only found at the cross of Christ.