Leder's term — from Greek ek-stasis, to stand outside oneself — for the surface body's outward projection into the world, vanishing from awareness precisely because it is functioning well.
Ecstatic disappearance names the first direction of the body's double self-effacement: the surface body — the body of perception and action — disappears by projecting outward into the world. Consciousness flows through the body's sensory and motor pathways toward the objects of engagement, and the pathways themselves become invisible in proportion to their functional excellence. The eye does not see itself; it sees through itself. The hand does not feel itself gripping; it feels through itself toward what it grips. The better the pipe works, the more completely it vanishes. Ecstatic disappearance is the foundation of skilled engagement, flow, and every form of absorbed activity.
Ecstatic Disappearance
In The You On AI Field Guide
The term draws on ancient mystical vocabulary but Leder's usage is structural rather than spiritual. Where Plotinus and Teresa of Ávila described ekstasis as the soul's union with the divine, Leder identifies the same phenomenological structure operating in every ordinary moment of skilled engagement. The reader absorbed in a book, the carpenter at