A discussion on the need to reinvent Christianity for the modern era that also stimulates interest anew in the work of William Williams, Pantycelyn. Using Pantycelyn and the religious tradition inherited by the country's Welsh-speakers as a springboard for discussing Christianity in the present and future, it reopens the dialogue on redefining Christianity for the 21st century.

Cyfrol sy'n trafod yr angen i ailddyfeisio Cristnogaeth ar gyfer bywyd modern ac yn ysgogi diddordeb o'r newydd yng ngwaith William Williams, Pantycelyn. Gan ddefnyddio Pantycelyn a'r traddodiad crefyddol a etifeddodd y Gymru Gymraeg yn fan cychwyn y drafodaeth ynghylch Cristnogaeth heddiw ac yfory, ailagorir deialog ynghylch ailddiffinio Cristnogaeth ar gyfer yr unfed ganrif ar hugain.