The aim of this study was to explore the phenomenon of feeling unsure as viewed from the humanbecoming school of thought. From the humanbecoming perspective feeling unsure is a universal lived experience of health and quality of life. The purposes of this study were to understand the lived experience of feeling unsure from the humanbecoming perspective, to enhance understanding of the lived experience of feeling unsure as an essence of health and quality of life, to discover the structure of the lived experience of feeling unsure, to add to the body of knowledge on the phenomenon of feeling unsure, and to contribute to expand the theory of humanbecoming. The Parse research methodology was used to guide this study and answer the question: Whqt is the structure of the lived experience of feeling unsure? Ten persons living in community accepted to participate in this study. The processes of dialogical engagement, extraction-synthesis, and heuristic interpretation we re used for data gathering and analysis. The central finding of this study is Feeling unsure is wavering irresolutely with discerning ponderings arising in venturing with trepidations, while revering alliances. The findings of this study emerged as new knowledge that extend the theory of humanbecoming and enhance the understanding of the lived experience of feeling unsure.