You can't just make it up as you go along, mind.
God - Is a concept.
We are all one thing, separated only, by experience, because our (the) source (God, if you like) can only be all knowing if it experiences all knowledge - And all knowledge can only be acquired by perceiving every instance (Unbiasedly) from every perspective.
'EVERYTHING' in and of itself, is one thing.
Therefore - One thing is 'EVERYTHING'.
Apply any 'third-party' construct you like - But, ultimately, it's just you guiding you.