4. Practice where the body is concerned consists of fasting and vigil; where the mouth is concerned it consists of psalmody. But prayer is better than psalmody, and silence is more valuable than speech. In the case of the hands, practice is what they do uncomplainingly; and of the feet, it is what they do as soon as they are urged to do it.
St. Ilias the Presbyter, Philokalia V3.34