[3] He studied theology at St David's College Lampeter,[4] graduating with a first class Bachelor of Arts (BA) degree in 1922.

[3] Morris was ordained in the Church in Wales as a deacon in 1924 and as a priest in 1925,[5][6] both times by John Owen during services at St David's Cathedral.

[6] In 1924, he was appointed Professor of Hebrew and Theology at St David's College, Lampeter,[7] holding the post until his elevation to the episcopate.

[citation needed] He also campaigned against the retention of the word "Protestant" in the Coronation Oath, entering into detailed correspondence with the then Archbishop of Canterbury, Geoffrey Fisher, on the issue.

[13] Nonetheless, Fisher (who had by then retired) and Morris were later among those senior clergy who objected to the proposed Anglican-Methodist reunion which was being mooted during the late 1960s and early 1970s.

The John Piper east window and mural at St Woolos' (Gwynllyw) Cathedral in Newport, Wales, were commissioned and installed during his episcopate.