What is the soul or spirit made of, exactly?

[unity100]

You are the Creator. You wouldn't cease to exist. Ra's use of the word loss possibly means "not beneficial". It's not beneficial when a specific self's contribution to the exploration of infinity is halted and not able to move forward. Thus, this would be a "loss".

the construct that is the mind/body/spirit complex would cease to exist though. just like how it ceases to exist when the entity returns back to the central logos at the end of octave.

the spirit part which was originally a part of the central logos would naturally return to the central logos.