Wisdom is "about" something or more akin to the "action of being
   wise about something". It's not really a 'thing' by itself, just
   like "Love" isn't a 'thing' by itself. == As noun, it's ALMOST
   useless. Wisdom. It carries a sense with it. Something
   mysterious and deep. Something almost beyond comprehension. Woo.
   But as an action (the act of being wise) then it is useful. It's
   like love. "What is love?" people go nuts over that. Love really
   isn't anything per se. But there's the action-of-loving. A
   feeling you project outwards towards someone/something. That's
   tangible in a sense. But love as a noun? Standing all by itself?
   It might as well be a Greek statue of a God somewhere with
   properties and stories behind it but nothing tangibe beyond the
   granite making up the statue.