As an ancient Christian community, the Mar Thoma Church with its vibrant life of mission and sacraments, has a pride of place in the Christendom. The evangelization process and constant migration made this church a global Church, which has encountered multi-cultural and multi-ethnic atmosphere and assimilated various cultural practices and faced faith confrontation in its own geographical regions. This confrontation has caused a renewed view of nature, identity and mission of the Church in a positive manner. Mission is, in fact, the lifeblood of the Church. Through its mission-work and revised liturgy, the Mar Thoma Church took a pioneer role in the formation and nurturing of new Christian communities in India and different parts of the world. Hence, this book reflects on the role of liturgy and its influence on the missionary undertakings of the MTC. It elucidates how the revised liturgy functions as a basis for mission and recounts how liturgy and mission are connected. Further, the diverse mission centres of the Church and its cultural specialties, an integration of liturgy and evangelism, importance of liturgicalorientation and training, are also dealt with in detail. Added to this, the various challenges of the Church in its mission fields and diaspora regions are studied in the framework of the liturgy. The scope of liturgical renewal is looked into where the liturgical adaptation and possibilities of contextual liturgies in the Church are studied. This study concludes with some of the pertinent liturgical proposals for the furtherance to sustain the life and mission of the Church. With a living experience and profound theological understanding, this ancient but reformed Church has something unique to offer to the whole Christendom.