When we come to God on bended knees, there is communication that happens. Fasting communicates a longing, sincerity, and intensity toward God. It brings a different kind of urgency to our prayer that we do not always experience in times of prayer unaccompanied by fasting.
Fasting also helps us listen to God so we can hear the direction that He has for us. In our cluttered and food-sourced culture, there are so many distractions that take away our capacity to hear God's voice.
Getting away from those distractions, declaring our independence from the pervasive consumerism, and listening quietly through a season of fasting and prayer enables us to hear God and gain clarity. Click on this link to listen to Joel: http://www.westwoodcc.org/Pages/Resources/Message.aspx?ID=196