। ॥
In plain words
Sad Darśanam, an excellent work, pure, composed in the Tamil tongue by the Maharṣi Śrī Ramaṇa: the sage of Vasiṣṭha's line has rendered it into the speech of the immortals and set it forth.
Word for word
Sad Darśanam, composed in the Tamil tongue by the Maharṣi Śrī Ramaṇa, a pure and excellent work: rendering it into the speech of the immortals, the sage of Vasiṣṭha's line has set it forth.