कदाचिदात्मनैवात्मा स्वयं शक्त्या प्रबुध्यते ।कदाचिद्विष्णुदेहेन भक्तिलभ्येन बोध्यते
In plain words
Sometimes the ātman, by the ātman alone, awakens itself through its own śakti; sometimes it is awakened through the body of Viṣṇu, a body reached through bhakti.