Waoo this is an interesting contribution from you and I'm really gland to heard some vital information to that will really help me from you own point
As you say wisdom is the principal thing ,I can now see why is called the principal thing just becaise is the master of all and it carries all the our part alone with him
Understanding and knowledge are so useful in the part of wisdom because those are the weapon she uses before taking are fina decision
That is the most reason why a person with sagacity must really be appreciated because their are reare and can not be found everywhere