Keepयतस्ततः प्रयत्नेन पौरुषेण विनश्यति ।अकृत्रिममपि प्राप्तं भृशं पुत्र तथा पुनःIn plain wordsTherefore, by effort — by pauruṣa — it perishes; and even what is uncontrived, though deeply acquired, likewise perishes, O son.