Anguish is a fundamental concept in the phenomenological-existential clinic. This affective disposition has in Martin Heidegger's work a privilege over other dispositions, since it, in its ontological character, is the engine of human existence. This paper aims to understand anguish as revealing the truth of Being-there in the psychotherapeutic process, based on the contributions of philosopher Heidegger and his commentators, especially exponents of phenomenological-existential psychology.

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... ions such as "What is the truth of Being-there?" And "What does anguish reveal about this truth?" Guided the construction of this work. The study is characterized as a qualitative research, whose methodology is bibliographic research. The results indicated that anguish reveals the truth of Being-there. What we call the truth is the essence of this being: having to be. It points to its ontological character of openness, its possibilities, its own power-being, freedom and the unveiling of the meaning of Being. Finally, the ontological anguish, not restricted to the psychotherapeutic process, moves Being-there and reveals possibilities that, by their very nature. through care makes its uniqueness possible. Thus, it is essential for the psychotherapist to understand distress, facilitating the patient's appropriation and accountability of what it reveals. Palavras-chave : Anguish; Heidegger; Truth; Being-there; Psycotherapy.