Within the depth-psychology corpus, well-being resists reduction to a single register. It appears simultaneously as an empirical outcome variable, a philosophical problem, a spiritual endowment, and — most provocatively in Jung — something that must be subordinated to the demands of the unlived life. The empirical literature (White, Anderson, Keltner, Bettmann) treats well-being as a measurable state associated with nature contact, awe, and physiological regulation, establishing dose-response thresholds and mediating mechanisms. Here well-being is largely hedonic and eudaimonic: life satisfaction, reduced stress, flourishing. A second register, represented by Siegel, locates the ground of well-being in relational connection and the dissolution of a rigidly bounded self — consonant with depth psychology’s broader suspicion of isolated ego-consciousness. A third register, drawn from spiritual sources (the Philokalia, Plotinus, Laudet), roots well-being in participation in a transcendent order, naming it as contingent on grace, meaning, or alignment with the Good. Most arresting is Jung’s Red Book formulation, where ‘the spirit of the depths’ explicitly overrules personal well-being in favor of the fullness of life — a challenge to any merely comfort-seeking psychology. The tension between well-being as a clinical target and well-being as a by-product of living one’s unlived depths constitutes the animating problem of this entry.