The Jesus prayer
One of the first things I went to work on acquiring when I began exploring Orthodoxy was the Jesus prayer as part of my prayer rule.
“Lord Jesus Christ Son of God, have mercy on me the sinner.”.
I researched it and began praying it. Continually? No. Without ceasing? No. I try and do not give up in my efforts. The Jesus prayer is used, and has been used, by Christians for centuries. It is the prayer that is used to fulfill the 1 Thessalonians 5:17 ‘…pray without ceasing’- scripture.