IOD facilitates studying (Study) the liturgy of the Church on one hand and exploring ways of transforming oneself to develop a service-oriented life:

– To promote greater understanding about the Church liturgical calendar, the IOD annually organizes the Lenten and Advent Retreats.
– For proclamation of the gospel truth to the diaspora community by way of gospel convention in English, now popularly known as the Delhi Gospel Convention.
– Bible Study Classes are also conducted every month in various regions of the Diocese.

The IOD also organises study groups, lecture series, quiz, seminars, symposia and regional and annual conferences on the study of the Bible, the faith of the Church and social issues.