Wonder is the first passion in all inquiry and our reason to know, yet a phenomenon that is largely neglected in organizational research. Taking a relational and process approach, we develop a theory for the role of wonder in organizational inquiry. We propose that wonder in inquiry unfolds as a twofold movement between receptive appreciation and self-transcendent search, and we chart wonder’s course in four stages or "moments" of arousal, expansion, immersion, and explanation. Examples from generative experiences in qualitative research, hydrocarbon exploration, and feature journalism are used to illustrate and qualify this theory. At last, we emphasize main implications for organization studies in the importance of wondering together, of upholding the mysteries of wonder, and of keeping wonder alive in our conversations.