1651, Jeremy Taylor, Twenty-Seven Sermons for the Summer Half-Year, Sermon II, Part II in ΕΝΙΑΥΤΟΣ: A Course of Sermons for All the Sundays of the Year, London: Tyler & Royston, 1668, p. 14, https://books.google.ca/books?id=heNBAQAAMAAJ&printsec=frontcover#v=onepage&q&f=false
This may seem strange; and indeed it is so: and it is one of the great mysteriousnesses of the Gospel.

And all this is not changed by adding "mysterious" experiences to "manifest" ones, self-confident in the wisdom that recognizes a secret compartment in things, reserved for the initiated, and holds the key, O mysteriousness without mystery, O piling up of information! It, it, it!

Mysteriousness

Meaning

Noun

Origin

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