it's the undefined things that make us irresistibly scramble for definitions.

True! I always want to know, in concrete terms, what everything is! For example, energy. I know it is a
"force", but--what is it??? I want to be able to touch it, to see it, to view it in its smallest, most precise, basic state of being. I want to know if it has an
odor, and whether I can hear it. And speaking of odor--how is it, exactly, that we can smell things? Do molecules of something delicious baking in the oven somehow slip out the openings and get drawn into our nostrils? Oh, I want to know!