Ignorance of certain subjects is a great part of wisdom

This was the quote on my tea bag today.  I have been having a good chuckle about it ever since.  I have always thought that ignorance is bliss, but I never really thought of ignorance as a sign of wisdom.  I think of all the things that I know a lot about, a little about, and absolutely nothing about.  I wonder how they stack up to who I am?

Stuff I really know:
1.  I know about music.
2.  I know how to solve logical problems.
3.  I know how to teach people so they learn.

Stuff I know a little about:
1.  I know how to give a massage. I am certified, but could know much more.
2.  I know how to exercise and eat well.
3.  I know how to travel.

Stuff I know nothing about:
1.  I don't know if my prayers mean anything.
2.  I don't know if I can sustain my weight loss.
3.  I don't know what I should know.

So, for now, I am going to think it over.