moksha

moksha is a release, 

it is a totally free existence, 
so it necessarily is an existence that is absolutely free of karma, 
unaided by any level, gross, subtle, subtlest, 
even process of knowing,

it is the state of knowingness , beyond the trinity of knower, knowing, known , 

since sankara was in that state, he knew what it is, 
and he explained it in the best possible way in the bhashyam 

.....to get at that level of existence, ie mokasha, one must go beyond even bhashyam , 
since reading, listening, and understanding the bhashyam / scriptures also is a karma of some level