"The oxymoron is preferred by the mystic because it allows him to express something ineffable, because it is the best tool for talking about the unspeakable, because in the world of duality it creates the coincidentia oppositorum, which Nicola Cusano (1401-1464), in the context of his theology of the Incarnate Word, considered almost the least imperfect definition of God. The mystic, in his talk of God, punctuated by “improprietas”, “voces obscurae, horridae, inauditae”, seeks to touch the divine linguistically through a paroxysmal accumulation of oxymorons."
January 1, 1970
https://en.wikiquote.org/wiki/Unity_of_opposites