Verse 99

99. The knowledge of the eternal enlightened one, does not cross over into the entities; all entities likewise do not cross over into the knowledge, this has not been declared by Buddha.

It has been well established and often stated that the Truth of Existence is the Reality of the Absolute Singularity of the Primal Consciousness and Knowledge Alone.
It is a consequence of the above, but it has also been well established by this Karika that all entities and all of Creation are without true existence.
It has been well established by this Karika that all entities within Creation are but the vibrations of knowledge as Consciousness, that is to say, all phenomena are consciousness and knowledge displaying to consciousness and knowledge.
It has been well established and properly explained in this Karika that the Knowledge of the object, the object of knowledge and the knowable are One, a Unity. This Unity is Primal Consciousness and Knowledge Absolute. Advaita.
This verse confirms that due to the entities being non-existent in reality they do not have the validation of their own Knowledge. Being non-existent they have no original Knowledge. They in fact are non-existent due to the fact that they are empty of original (origination) knowledge. The ultimate meaning here is that nothing within Creation has been caused or originated either from original Knowledge (The Absolute Self) or any other cause.
Finally this verse declares that apart from the Primal Consciousness and Knowledge Nothing else comes into existence, Apart from the Primal Consciousness and Knowledge no other knowledge arises whatsoever. It is claimed by the Karika that Gautama Buddha, at least, omitted to declare this observation.