Pattern: Drowsiness During Sitting, Mistaken for Stillness
Recurring reports in the practitioner archive: practitioners — especially beginners and the chronically tired — report falling asleep or sinking into dull drowsiness during seated practice, and asking whether this is normal, failure, or (optimistically) progress.
What the tradition says. The classical manuals are unambiguous: drowsiness (昏沉) is an error state, and mistaking it for stillness (入静) is a named beginner’s mistake. The distinction is drawn in experiential terms — true stillness is lucid, light, and clear (心神明晰，身心轻爽), drowsiness is dull and heavy (糊里糊涂，身心浊重). The manuals’ cause-list is practical rather than moral: heavy or greasy food before sitting, collapsed posture (head drooping, back bending), and sitting while exhausted. The remedies follow the causes: eat lightly, hold the posture, rest before sitting.
What modern discourse adds. Community replies typically explain sleep-onset as accumulated fatigue surfacing under relaxation — the body taking the stillness as permission to rest. This is consistent with, but not identical to, the traditional account: the tradition treats drowsiness as something to correct, the modern community often treats it as information to accept.
Separation of evidence. This is a pattern of practitioner and community reports (PRACTITIONER EXPERIENCE / CONTEMPORARY COMMUNITY OBSERVATION), not a research finding. The tradition’s distinction is TRADITIONAL / LINEAGE INTERPRETATION. Nothing here is claimed as scientific; there is no dedicated research on drowsiness in Daoist sitting specifically. See EXP-001 and the linked question page.