Aiki is one of those things I try not to think about too much. ... What this means is that there are a whole lot of different ideas out there about what aiki is, and I think it would be a pretty presumptuous and largely fruitless endeavor for me to try to decide which one is "right".
I'd much rather spend my time trying to figure out what good aikido is; that's nebulous enough without trying to grab hold of a concept so broad and so varied in interpretation as aiki.
I would say, you need to think about it. Or rather, find those who have thought about it and go seek them out, because then you might begin to find what you seek. If you do Aikido, it is your main task to seek aiki
, in my opinion.