The problem of the beginning of philosophy is well know.   One must choose a fundamental approach and then forget the choice, refuse to acknowledge its contingency.  One then builds a massive edifice on the presupposition, a castle on a cloud - which makes the cloud invisible.   It is more honest to note that there are four possible approaches (the four cardinals) and that each corresponds to a mode of will that is to some degree not accountable - or at least not consciously chosen.   But to stop here is not enough.  One then has to order  the approaches -  as an ascending path of liberation - and construct a provisional system that derives from all four.