Matthew 6:16-18 says, “And when you fast, do not look gloomy like the hypocrites, for they disfigure their faces that their fasting may be seen by others. Truly, I say to you, they have received their reward. But when you fast, anoint your head and wash your face, that your fasting may not be seen by others but by your Father who is in secret. And your Father who sees in secret will reward you.”
Sam Storms said, “I want to insist that, contrary to popular opinion, fasting is not the suppression of desire but the intense pursuit of it. We fast because we want something more than food. We say No to food for a season only to fill ourselves with something far more tasty, far more filling, far more satisfying. That is to say, if one suppresses the desire for food it is only because he or she has a greater and more intense desire for something more precious – something of eternal value.”
You can listen to over 150 podcasts that I did on fasting at Prayer Motivator Devotional.com. When you get there, click on the “Fasting Edition” link.