 Stace’s essentialism has generated much discussion (Stace 1960). He proposes two mystical experiences found “in all cultures, religions, periods, and social conditions.” First, he identifies a universal extrovertive experience that apprehends the One or the Oneness of all in or through the multiplicity of the phenomenal world that is the inner life or consciousness of the world. The Oneness is experienced as a sacred objective reality in a feeling of “bliss” or “joy.” This universal extrovertive experience (or the experienced reality, it is not always clear which) is paradoxical, and possibly ineffable (Stace 1960, 79). Second, Stace identifies a universal monistic introvertive experience that “looks inward into the mind” to achieve “pure consciousness” — i.e., an experience phenomenologically not of anything but consciousness (Stace 1960, 86) — i.e, a PCE. Stace calls this the “unitary consciousness” or the “void and empty unity” that is left when all empirical content is excluded (Stace 1960, 110). Like his extrovertive experience, Stace’s universal introvertive experience involves a blissful sense of sacred objectivity and is paradoxical and possibly ineffable. Stace considers the universal introvertive experience to be a ripening of mystical awareness beyond the halfway house of the universal extrovertive consciousness.