Ietsism

Ietsism (Dutch: ietsisme, pronounced [itsˈɪsmə] ^ⓘ) is an unspecified belief in an undetermined transcendent reality. It is a Dutch term for a range of beliefs held by people who, on the one hand, inwardly suspect – or indeed believe – that "there must be something undefined beyond the mundane which may or may not be possible to be known or proven", but on the other hand do not accept or subscribe to an established view of the nature of a deity offered by any particular religion. Some related terms in English are agnostic theism (though many ietsists do not accept – or have more subtle beliefs about – the conventional conception of "God", and therefore are characterized as agnostic atheists), advocates of eclecticism, the perennial philosophy, deists, or those who are spiritual but not religious.

Ietsists might call themselves Christians or followers of another religion based on cultural identification with that religion, without believing the teachings of that particular religion.