Humanism and Method

Modern Philosophy might be taken to be Humanist because of a foundation in human experience--'I Think', or a Sense-Datum.  However, Humanism excludes supernatural premises, and each of those, upon further scrutiny, is revealed as an element of a supernatural system: the Cartesian I is an incorporeal Soul the existence of which presupposes that of a Deity, while, as Berkeley shows, a Sense-Datum is actually an incorporeal Phenomenon that is a sign the source of which is a Deity.  More important, neither of those two is the foundation of their respective systems.  For, each is preceded by a Method--a Rationalist or an Empiricist establishment of Certainty, and it is Method per se which is irreducibly Human.