Is ait an mac an saol.
Life is strange.
In Irish, the definite article is used to express abstraction whereas in English the same is done with an indefinite article, or no article at all. To ancient Celts, both the clan and the world were composed of living things. For example, recall the Lady of the Lake in Celtic, Arthurian legend. She was the living embodiment of the world's bodies of water. This is why the word 'saol' means both life and world.