evam-in this way; abhyasyatah-of the person practicing this yoga system; cittam-the heart; kalena-in due course of time; alpiyasa-very shortly; yateh-of the person practicing yoga; anisam-without cessation; tasya-of him; nirvanam-purification from all material contamination; yati-reaches; anindhana-without flame or smoke; vahnivat-like a fire.