The Christian's Thoughts about the Penance and the administration of the Lord's Supper

The main idea of the work by saint John "The Christian''s Thoughts about the Penance and the administration of the Lord''s Supper" -is the necessity of the real passionate faith in God an life in faith, in the restless fight with the "passions and lusts", devotedness to the faith and Orthodox Church, as he only saving one.