Chediath was born at Athirumkal, Pathanamthitta, Kerala on May 29, 1945. His parents are C. G. Daniel (+ 2004) and Saramma. He had his Seminary Studies at St. Aloysius Seminary, Trivandrum and St. Thomas Apostolic Seminary, Vadavathoor, Kottayam. He was ordained a priest on December 20, 1969.
He was appointed the Secretary to Archbishop Benedict Mar Gregorios. He was the Vice Rector (1970-1973) and later Rector (1993-1996) of St. Aloysius Seminary, Trivandrum. He had his Doctoral Studies at Augustinianum, Rome. He wrote his Doctoral Dissertation on the Chrstology of Mar Babai the Great (+ 628).
Professor and Expert
He taught at the St. Thomas Apostolic Seminary, Vadavathoor, Kottayam (1979-1993) and is a Permanent Professor of the Pontifical Oriental Institute, Kottayam. He is a Resident Professor at St. Mary’s Malankara Major Seminary, Nalanchira, Trivandrum since 1996. He taught also at the St. Ephrem Ecumenical Research Institute (SEERI), Kottayam and Missionary Orientation Centre (MOC), Kottayam. He was a member of the Pro-Oriente Syriac Commission and is a member of the Forum Syriacum of the Pro-Oriente Foundation. He was one of the Malankara catholic representatives of the Catholic- Malankara Orthodox and Catholic- Syrian Orthodox International Theological Dialogues. He is a consultor of the Synodal Commission for Theology and Publication of the Syro-Malankara Catholic Church. 
He has authored 82 books in Malayalam on Patrology, Ecumenism and Church History. He has also authored 9 books in English. The Christology of Mar Babai the Great (1982) is his masterpiece. He has also served as the section editor of the Theological Quarterly, Christian Orient.
- Malankara Seminary
- Babai the Great