To find the new direction besides x y and z, you need a gatekeeper from beyond 3 or below 3 dimensions. The easiest way to find a gatekeeper is with a guide. My guide's name is Simon. He is a whispy shadowy figure, and has vast knowledge about most things, but will only share what he believes is helpful. He has no face; he is a nopperabou.
To find the gatekeepers, you will need to find someone like him. Start by looking sideways. or, if you simply wanted to learn about the gatekeepers I met, start by looking to the side.