Is your stomach your god? Is your mind set on earthly things? What is your destiny? Is shame your glory? What the Apostle is really getting at here (Philippians 3:18-19) is that natural, worldly, fleshly and sensual appetites are at odds with the cross of Christ by which mankind comes to salvation. And so, they are at odds with the pursuit of a Christ honoring lifestyle. They are ruled by a gluttonous spirit and so conformed to it and its final destruction. Fasting and prayer can help bring this into obedience to the cross.