This reminds me of a saying we had in high school:
Freshmen know not, and know not that they know not.
Sophomores know not, and know that they know not.
Juniors know, and know not that they know.
Seniors know, and know that they know.
Freshmen know not, and know not that they know not.
Sophomores know not, and know that they know not.
Juniors know, and know not that they know.
Seniors know, and know that they know.
...you realize that you still "know not that you know not, know that you know not, know not that you know, and know that you know" about most everything.
Thus becoming humble and wise...?
He knows not and knows not that he knows not is fool. Shun him.
He who knows not and knows that he knows not is a student. Teach him.
He who knows and knows not that he knows is asleep. Wake him.
He who knows and knows that he knows is wise. Follow him.
I'd prefer to say wisdom is knowing what you know and what you don't, and it's much harder and more valuable than you might think.