Dalua appears in early Irish hagiography and poetic lore, most notably as a companion to Saint Columba or as a mentor figure who embodies ascetic wisdom and communion with the natural world. Sometimes portrayed as a wild man of the woods or a hermit with prophetic gifts, Dalua symbolizes the liminal space between Christian sanctity and pre-Christian Celtic spirituality. Poets invoke Dalua to explore themes of solitude, divine inspiration, and the untamed landscape as a source of spiritual and artistic revelation, reflecting the syncretic nature of early Irish literature where pagan myth and Christian doctrine intertwine.

Dalua appears primarily in early Irish hagiographic and monastic literature rather than the mythological cycles like the Ulster or Fenian tales, often serving as a foil or spiritual challenger to figures like Saint Columba (Colum Cille); his name may derive from dall, meaning "blind," symbolizing inner sight or prophetic insight beyond physical perception; poets—especially from the Celtic Revival like W.B. Yeats—use Dalua to represent ascetic wisdom, the harsh muse, or the wild, untamable aspect of divine inspiration; he is sometimes conflated with or compared to hermit saints or pre-Christian seers, embodying the syncretism of Irish Christian and pagan traditions; related concepts include the fír fer (true man) ideal of early Irish monasticism, the geilt (wild madman or exile), and the liminal figure of the fili (poet-seer); when analyzing or writing poetry invoking Dalua, consider his role as a threshold guardian between civilization and wilderness, orthodoxy and mysticism, silence and revelation.