This document has four major aspects. The first chapter will outline the life of internationally-known composer Fr Ivan Moody. The biography will focus on Moody's educational experiences and influences; his commentary on music, theology, and composition; and his service as a priest in the Russian Orthodox Church. The second chapter examines the impact of Orthodox practices on Fr Moody's music. This chapter focuses on Orthodox rite practices, requirements of music within these conventions, and their influence on Moody's compositional output. A brief discussion on Moody's theological writings on mystical music is also included. Moody has composed a wide variety of choral works, and the third chapter will delve into his compositional influences and practices. This chapter will draw connections between educational and theological influences and their role in the development of Moody's unique compositional voice. Each aspect is reflected through dialog and analysis of musical examples from various periods of his compositional career. The final chapter contains an annotated catalogue of Moody's extensive choral output. The catalogue is organized chronologically and contains information pertaining to duration, inception, forces, text, and premiere performance.