This rich and diverse collection of texts newly translated from Latin, Irish and Welsh marks a landmark in the study of Celtic Christianity. In these pages we find saints’ lives, sermons, liturgy, monastic rules, penitentials and exegesis a well as devotional texts, poems, and works of theology. The effect is to create a sense of a Christian civilisation that is deeply life-arffirming, imbued with a pervasive sense of divine presence and wonderfully at ease with itself.