There is one belief that destroys artificial barriers to perception, an expanding belief that automatically pierces false and inhibiting ideas. Now, separately:
The Self Is Not Limited.
That statement is a statement of fact. It exists regardless of your belief or disbelief in it. Following this concept is another:
There Are No Boundaries
Separations of the Self.
Those that you experience are the result of false beliefs. Following this is the idea that I have already mentioned:
You Make Your Own Reality.