p. 244
इदानीम् ईश्वरार्थमनुष्ठीयमानानां तत्प्राप्तिसाधनज्ञानापेक्षितशुद्धिद्वारेण पारम्पर्येण पुरुषार्थत्वम्; अन्येषां संसारानर्थहेतुत्वेनापुरुषार्थत्वं च दर्शयति श्लोकद्वयेन—
In plain words
Now, in the next two verses, he shows this: acts done for the sake of the Lord do count as a human goal — not directly, but along a chain. They purify, and that purity is what the knowledge of the means of reaching Him requires. All other acts are no human goal at all, since what they cause is saṃsāra, and saṃsāra is precisely the thing no one should be aiming at.
Close to the Sanskrit
Now, by means of two verses, he shows the character of being a human goal — indirectly, through the intervening chain, by way of the purity required for the knowledge of the means of attaining Him — belonging to acts that are performed for the sake of the Lord; and the character of not being a human goal belonging to the others, on account of their being the cause of the evil that is saṃsāra.