it becomes an almost exact synonym for our ‘numinous’ under all its aspects… it at the same time exercises a supreme ‘fascination’. And this its dual character, as at once an object of boundless awe and boundless wonder, quelling and yet entrancing the soul, constitutes the proper positive content of the ‘mysterium’
Otto articulates the tremendum et fascinans as the constitutive bipolarity of numinous experience — the mysterium’s positive content being precisely this paradoxical union of annihilating awe and irresistible wonder.
, The Idea of the Holy: An Inquiry into the Non-Rational Factor in the Idea of the Divine and Its Relation to the Rational, 1917thesis