Complex sentence: In ancient Latvia, Dievs was not the just the father of the gods, he was the essence of them--every other deity was a different aspect or manifestation of Dievs; this is most true with Māra and Laima.
Split into simpler sentences: In ancient Latvian mythology, Dievs was not just the father of the gods, he was the essence of them all. Every other deity was a different aspect or manifestation of Dievs; this is most true with Māra and Laima.