Mythopoetic Participation designates the condition in which psyche, ritual, and living myth interpenetrate so completely that the participant does not observe a story from outside but enacts it from within — becoming, for the duration of the rite or imaginative act, a co-author of the cosmos. The depth-psychology corpus approaches this condition from several converging angles. Eliade establishes the archaic substrate: in cyclical, non-historical cultures, the telling of cosmogonic myth is itself a creative act that regenerates the world; participation is not metaphorical but ontologically effective. Campbell translates this insight into the language of personal transformation, insisting that ritual is myth enacted and that such enactment renders the participant transparent to the transcendent. Hillman radicalizes the position by arguing that mythical consciousness does not require an ‘as-if’ hedge: entering myths means recognizing one’s concrete existence as mythic enactment, not an analogy but a direct inhabitation of archetypal reality. The Mythopoetic Men’s Movement, documented extensively by Russell, represents a late-twentieth-century institutional expression of this principle — deploying poetry, drumming, and storytelling to restore in modern men the emotionally participatory register that secular culture has occluded. Kalsched, more clinically minded, identifies what he calls the ‘mythopoetic aspect of the unconscious’ as the stratum Jung defended against Freud: the layer in which fantasy is not mere wish-fulfilment but carries genuine ontological weight. The core tension across these positions concerns whether participation is a therapeutic technique, a cosmological fact, or both.