Verse 13

कटूकृतान्तःकरणो नानासुखविशारदः ।वर्धते हि गतस्नेहं जन्मप्रतिविषारसः

In plain words

The bitter juice of the prativiṣā-herb that is birth -- which has made the antaḥkaraṇa bitter, and is skilled in pleasures of many kinds -- grows on and on, void of sneha, of oil and of affection alike.