In a clean place, having established a firm seat for oneself, neither too high nor too low, covered with cloth, antelope skin and kuśa grass.

Kṛṣṇa details the physical space for meditation. Śucau deśe (clean place) coincides with the Haṭha Yoga Pradīpikā’s instructions about the practice hermitage.

Sthiram āsanam (firm seat) here means literally the meditation seat, not the postures of Haṭha. The yogī needs a stable base to sit for long periods.

Nāty-ucchritaṃ nāti-nīcam (neither too high nor too low) indicates practical sense: too high causes instability; too low, discomfort.

The traditional materials — kuśa grass, antelope skin (ajina), cloth (caila) — have symbolic meaning and practical functions: thermal and electrical insulation from the ground.

For the modern practitioner: any clean and insulated surface works. The principle is to create a dedicated space that signals to the body-mind: here we practice.

Note that Kṛṣṇa doesn’t disdain material details. Genuine spirituality doesn’t ignore the practical.