Everything depends on the point of view, or frame of reference. This was the core realisation of the Copernican revolution. Wat seems complicated and demanding of continual intellectual effort from one point resolved into intuitive simplicity and naturalness when seen from another. However the move from one point of view to another is not itself a result of intellectual or any other kind of effort; there is no point of view on points of view, no knowing what the space of all possible frames is, no limit to the possibilities - this is something unknowable about the mind. It does not suffice to point out how much un-needed reification is involved. Otherwise, they would not be points of view.