Small work "Interpretation on the 50th psalm" of beatific Феодорита, bishop Кирского (373-466), is self-control from his large labour "Interpretation on one hundred fifty psalms". This 50th psalm or, as him it is accepted to name, repented, was though pronounced by a saint prophet by David on a concrete occasion, but, undoubtedly, became the most bright expression of the repented mood of every repentant пред God soul in any epoch. With it the frequent reading of this псалма is constrained after church divine services and in domestic prayer. The brought expressing over of this псалма of блж. Феодоритом Кирским will help better to grasp the meaning his lines - both historical and theological, and consequently, yet deeper and сознательнее penetrated by his repented mood.