This study deconstructs the traditional concept of trauma and the crisis of being over-objectified of the Bunun in Bokai in the context of Taiwan’s 921 earthquake in 1999. Through a review of the theoretical context and the discourse on cultural subjectivity in indigenous psychology, the agency of cultural subjectivity and the social practical logic in everyday life of the Bunun in Bokai are delineated. Results of the ethnographic data, which was collected through long-term participatory observation, indicated: (l) the importance of contemplating collective trauma and cultural healing as a “cultural being” of the Bunun; (2) the unveiling of is-ang (self/mind) as the fundamental social practice logic in everyday life for the Bunun; (3) the retreat from the limitation of the theoretical frame for the further commitment to the practical historicity embodied in the Bunun life world; (4) the articulation of the interactive and dialectic relationship between the breeding of social life predicament/suffering and culture-self healing; and (5) the flowing boundaries as a great part of Bunun hermeneutical circle for survival-/existence-proving.