Abstract
The aim of the study is to show the immanent limits of Heidegger's fundamental ontology and hence the need to transform the question of the meaning of being (Sein). The study has shown three such limits which are interdependent ‒ methodical-formal, structural-existential and factual.
Reaching the methodical-formal, structural-existential and factual limits leads to a failure of the project of fundamental ontology. But at the same time, facing these limits encourages the transformation of questioning the being (Sein).
In this transformation can be observed several significant moments. The first moment in years 1927–1929 can be described as the phenomenology of transcendence.
In this period also araises a question of being as a whole (Seiende im Ganze) and gradually the attention shifts to the issue of truth as un unconcealment (ALÉTHEIA). Now the truth as unconcealment and the relationship between overt and covert become central research questions in years 1929–1932.
In this time we can see that Heidegger abandoned the project of destruction of concepts of ontological tradition and that in years 1929–1932 he gradually adopted his later conception of thinking of history of being (seynsgeschichtliches Denken).