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Well, we would need to start with our own definitions so we knew we were talking about the same things. In the framework I'm talking about, spirit could mean a soul (if you are religious, etc) or even just a visionary self - something that sees the big picture and aspires to broad minded. As far as integration, I think of it as a "whole is more than sum of parts" type of thing. A bone is very different than a heart, yet they are both integrated into a whole body, for example. You're not meshing the bone with the heart, just as you're not meshing spirit with rationality, but you're holding them both (and the other two - emotions and body) all as equal and valid parts of your whole self. The integration isn't to each other, but to a whole meta-self that arises when you allow the wisdom of each part of your self to show up and inform your life. Does that make sense?

I see, you are talking about developing several aspects, even though if they are different. That could work for some people I believe.

But I am not sure about a 100% rational mind wanting to be involved in spiritual subjects haha.

Still, it is an interesting take.

Fair enough!