Abstract. The article discusses metaphysical assumptions (Kantian metaphysics of the finite mind) and genealogy of the European Modern Project of cultural universality. The author tries to show both productivity and incompleteness of this project. After making those allowances, one can comprehend a task of substantiating human existence in language (communication) as that, which has inherited this touch of “incompleteness”. The latter manifests itself in a simulation of the Kantian problem – appearance of Another before the mind. However, it is not about the openness of mind (or human subjectivity) to natural determinations, as in Kant’s philosophy, but it is about the openness of human existence to sacred determinations, as Jaspers and Heidegger stated. The author conjectures that today, the transcendence of the content in the interpersonal communication, which made communication a self-development generator of the European culture, in its turn, would require a new solution to the problem of relationship between natural and sacred horizons of transcendence.