For more information that I've gleaned from some books:
NOTE, I'M NOT SAYING THAT I AM RIGHT OR WRONG, THIS IS WHAT INFORMATION I HAVE GATHERED.
Starseeds are beings that (believe in/believe to be apart of) a 'one soul' that all souls came from. This soul fragmented, so that the pieces could experience all there was to experience, so that some day all the souls would come back together enriched and all-knowing to return to tell the creator all of their stories. The fragments made the things in the universe, making some order out of the darkness and chaos. They organized into families, each one contributing something to civilizations. They further split up, allowing each soul to be able to walk all the life paths possible. They split into different polarities; male and female are a well-known example. The feminine and masculine take a different physical body, but that does not mean that a feminine soul part will be in a female body or that a masculine soul part will be in a male body.
This is as far as I have gotten with the book, it's all written in verse, so it takes sometime to decipher.
I will update in further deviations.