The question is, "to fast or not to fast?" In my own experience, strange as it may seem, I find it hard to pray on a full stomach. Before a meal, I have a sense of duty to thank God for the food. After the meal I am somewhat disinclined to pray. Gandhi fasted to plead his case with men. Jesus fasted for strength for the journey. Many religions uphold fasting as a means of piety and finding favor with God. I don't know about you but I find that prayer is most effective and most urgent when you don't have than when you do.