What Kind of Prayers does God Answer with "Yes?"

Through all the struggles, crises, problems, and pain of life, we find ourselves calling out to God for help.  And sometimes God moves to our aid.  But sometimes, He does not.Sometimes God answers "no," or "wait."  In fact, Scripture tells us that some of our prayers may even be sinful in their requests to God.  So, if we don't want to pray sinful prayers, and we want to pray prayers that will be answered affirmatively by God, what kind of prayers should we be praying?This message is one of a series that answers that question.