Abstract: Religious discourse is a specific object of linguistic study, because the attention is centered on the worldview questions that are based on belief in the existence of higher power, affiliation with which points to a sacred nature.  The subject of this research is sacredness, analyzed in the context of a religious discourse as its constitutive quality, which has a direct relation to the spiritual afterlife. Particular attention is given to the manifestations of sacred in the context of religious communication, its essential characteristics and functions. Sacred is referred to the category of topics that have always attracted attention of the scholars of various disciplines – sociological, phenomenological, and other. The main conclusion consists in the thesis that sacredness is a constitutive quality of the religious discourse that reflects the transcendent and immanent character of communication, as well as reveals such essential traits as the beauty, luminescence and spirituality. It is the source through which in the process of communication appear the apathetic and cataphatic divine qualities that affect the transformation of human being and unification of society, such as distinctness, eternity, omnipresence, almightiness, holiness and beauty.