After some years in Carmarthen he became minister of the Capel Bach, the Unitarian chapel in Aberystwyth, where he enrolled as a student at the University and graduated in 1945.
[1] Although Davies had intended to study for an MA degree, he received a call to minister the Unitarian churches at Highland Place, Aberdare and Hen-Dy-Cwrdd, Trecynon.
[1] In 1957, Jacob Davies returned to his native area to minister the three Unitarian churches at Alltyblacca; Capel y Bryn, Cwrtnewydd and Cwmsychbant.
[1] Politically, Davies supported Plaid Cymru, and unsuccessfully stood as a candidate in the inaugural Dyfed County Council election in 1973.
[4] Together with these various activities, Davies was prominent in his denomination beyond Wales and at the time of his death was President of the General Unitarian Assembly.