How to pass into the middle of the Earth at the poles is given through the words and graphics on page 65 and 66 and here we’re reminded that this is only a representation and again anything put into words or imagery has its limitations.
The three possibilities when up at the pole in a boat:
i) being completely oblivious to the opening to the centre of the Earth,
ii) by-passing it slightly and feeling unusual or iii) making it inside!
So once inside the Earth are we upside down or roundabout are we in rocks and magma is there Sky? Again the answer is to even be perceiving and to be present one would be existing more in the etheric plane and thus the somewhat limited thinking of how things must be isn’t dominating anymore it could look like anything now.