Abstract
In this essay, the author discusses the need to view rationality and mysticism in terms of their fundamental elective affinities. He then analyses this type of configuration from a theoretical point of view through one of the key episodes in the history of western thought, highlighting the affinities of design and structure between mysticism and illuminism. This is followed, in conclusion, by some considerations on their intrinsic dialectic within the postmodern sphere. After a conception that tended to freeze the infinite variety of life and its forms of expression into the abstract uniqueness of a universal grammar, this critical-mystical reasoning opens the way for new and different languages that can aid us in rethinking the destiny of humans and society.