Yes of course we can only understand what we can preceive.
We as humans study what we know, and we can only know what we as a specieis can know. If we learn something, it is because we were created with the ability to learn it... but what can\'t we know? ... as a species we do not know where our scientific abilities end, we are still studying space and dimensions etc....
In conclusion, theoretically we will eventualy be limited by the laws of the dimension we live in. But, if at any point we find a way to surpass these limitations, they were not limitations in the first place.... So perhaps that means we are never limited at all? perhaps...
So, if we do find our limitations, will we even know it? :O
perhaps like fish, our mental ability only reaches so far. Perhaps there is a level far beyond what we understand....
DUNDUNDUN!!!