Celtic mythology does not contain a single, overarching creation myth, as is typical of other cultures. Instead, it is a mosaic structure of various legends, legends, and symbolic stories that together form a picture of the origins of the world and humanity.
One such legend is the story of the Great Song (Oran Mór), which symbolizes the primordial melody from which all things emerged. According to this myth, in the beginning there was only an endless melody from which the gods, the earth and all living things were gradually formed. This song continues to this day, permeating all things and linking worlds together.
Another important story is the myth of the goddess Eiocha, who emerged from the foam of the sea and became the mother of the first gods. According to the legend, Eiocha gave birth to the first god, who then created other gods and goddesses. These deities, in turn, created humans from the bark of the oak tree and animals from other parts of the trees. Thus, the oak tree becomes a sacred tree symbolizing the connection between the gods, humans, and nature.
Another significant myth is the story of Cessair, who, according to the Lebor Gabála Érenn (Book of the Seizures of Ireland), was the first woman to set foot on Irish soil before the Great Flood. She arrived with a group of women and three men, but only one of them, Fintan, survived the flood, transforming into various animals and observing the history of Ireland for thousands of years.
Celtic mythology also emphasizes the importance of nature and its elements. Mountains, rivers and forests are often personified and endowed with divine qualities. For example, the goddess Cailleach is associated with winter storms and mountains, and rivers are often seen as the embodiment of goddesses or spirits.
Celtic creation myths are thus a rich and multi-layered belief system that emphasizes harmony between humans, gods, and nature. They emphasize the cyclical nature of time, the importance of natural elements, and the deep connection between all forms of life.