One who, established in unity, worships Me, present in all beings — though acting in all ways, that yogi remains in Me.

Ekāsthitaḥ (established in unity/union) — the devotee recognizes the underlying unity. Bhajati (worships, cultivates devotional relationship) to Kṛṣṇa present in sarva-bhūta (all beings).

Sarvathā vartamānaḥ — acting in all ways, in any situation. Even so, sa yogī mayi vartate — that yogi “lives in Me, is in Me.” Worldly life continues, but their center of gravity has changed.