All quite true, yet one hears that Player X "just doesn't have heart" or that Player Y "sure has a lot of heart."
These are all implicit measurements, based upon observation -- conclusions reached through analysis (say, comparison of X to Y).
So the mere fact that they are intangible doesn't mean one can't explore them objectively.
Sure, love is like pornography which Justice Potter Stewart famously said in 1964 he couldn't define but recognized when he saw it.
I'm still struck, however, by the internal contradiction that lurks in so many posts -- love is a choice (verb or noun), WAS is in the fog because s/he's not "in love" anymore (feelings are not a basis for decision-making), assess who you were in the M and make changes (analyze and deduce) -- but wait! Don't try to analyze love! Paralysis through analysis! It's all about the feelings!
