David would be the last for taking any credit in killing Goliath, the giant Philistine champion. But the faith and virtue he displayed on that unforgettable day teaches us that we can kill giants, too.
This is a topic seldom heard in the church (that also applies to gluttony). Fasting, however, is a Biblical topic and should not be ignored, especially when a fast is approved and pleasing to God. The greater question may be, “Are we commanded to fast?”