The Jesus Prayer…

“Every Christian can engage in inner prayer. But this prayer is mostly practiced by Orthodox monastics who cry out in their heart, ‘Lord Jesus Christ have mercy on me a sinner’ . These few words are the ones that apostle Paul writes about. With that simple but perfect prayer, one can fulfill the commandment – pray without ceasing. How blessed the fruits of this prayer are can be best known by those who practice it, then by those who have company with monks and nuns who practice it, [and then by those who have read the… [lives] of countless other holy fathers and mothers throughout the history of our church.”
St. Nikolai Velimirovich
~Missionary Letters #3