The Viel is not a separation between the states of existence. It only appears that way.
It's actually just where one form of energy ends and another begins, like where light meets shadow. The vibrational frequency that governs the physical state of existence changes at that point and the only reason why no one has broken the Viel is because it is not effected by energy from the physical state of existence.
Just like a shadow, anyone can pass through the Viel if they actually take the time to understand how it works and what it is.
All you need to do to pass through the Viel, or gain whatever your seeking on the other side of it, is to become one with that "wall" of energy.
Am I making sense here?