Within the depth-psychology corpus, mindfulness is neither monolithic nor narrowly Buddhist: it emerges as a contested, multi-tradition cluster of attentional practices whose therapeutic significance varies dramatically depending on the theoretical framework through which it is filtered. Harris locates mindfulness across four millennia of contemplative heritage and defines it instrumentally as psychological skill—openness, curiosity, and flexibility in attending—distinguishing ACT’s secular derivation from mainstream Buddhist-derived approaches. Siegel situates mindful awareness within developmental neuroscience, arguing that moment-by-moment, non-judgmental presence restructures the brain-relationship-mind triad. Epstein reads it through a Buddhist lens as a specifically temporal reorientation: the shift from spatial selfhood to flux-awareness that concentration practices alone cannot deliver. Ogden and Sensorimotor Psychotherapy reframe mindfulness as present-moment somatic tracking, a vehicle for disrupting automaticity and building interoceptive self-regulation in trauma survivors. Garland extends the concept into addiction neuroscience, demonstrating that mindfulness-based interventions reactivate atrophied prefrontal control networks and restore reward sensitivity through savoring. Dana operationalises savoring—the brief, intentional amplification of ventral vagal moments—as a polyvagal-inflected form of present-moment awareness. Gendlin’s Focusing, while rarely invoking the term directly, functions as mindfulness from the inside out: a disciplined, non-analytic attending to the pre-conceptual felt sense that moves the body-mind forward. The corpus thus reveals a productive tension between mindfulness as broad attentional skill, as Buddhist liberative practice, as somatic regulation tool, and as neurocognitive intervention.