The text here translated is that of a course of lectures that Heidegger gave at the University of Marburg during the summer semester 1925.
Embarks upon a provisional description of what author calls "Dasein," the field in which both being and time become manifest. This title analyzes Dasein in its everydayness in a deepening sequence of terms: being-in-the-world, worldhood, and care as the being of Dasein.