Not only must we all pay attention to what we are eating, but we must also abstain from every sin, so that while the belly fasts, in the same way the tongue should also fast. In other words, we must abstain from slander, from lying, from vain talking, from mocking others, from anger and, in a word, from every sin which we commit with the tongue. In the same way, our eyes must also fast and not look at vain sights. Let us not be haughty with words and not look at anyone with rudeness and audacity. In the same way, if we are fasting, our fasting is pleasing to God when the five gates of our senses are well closed and preserve us pure and undefiled.
- St. Dorotheus of Gaza
