It's a buy two get one free thing, the third is understanding the relationship between the two while most think binary - either this or that. Duality means the best part is missing.

God made man, man made religion and truths so the Universe as a whole is pretty much man-made. That's why God is apparently schizophrenic - he stood back and let us get on with it because he couldn't be bothered any more.

Schitzo quite literally meaning ambivalent, but like to the point where it becomes a problem.
I think we are all ambivalent to some degree, I mean when im thirsty and want a soft drink it takes me a good few minutes to decide.