ability to discern

inner qualities

hmmm, does not quite grasp the meaning,
so I search for another definition

knowledge of what is true + right

coupled with just judgment … sagacity


of keen and farsighted judgment


intellectually alertcharacteristic of a quick penetrating mind


the process of forming an opinion or evaluation by discerning and comparing


the quality of being able to grasp and comprehend what is obscure

So maybe the original definition was spot on.

the beginning of wisdom