शुद्धचैतन्यरूपत्वं चित्त्वं ज्ञानस्वरूपतः ।अखण्डसुखरूपत्वादानन्दत्वमितीर्यते ॥ ६११ ॥
In plain words
Its nature as pure consciousness is designated as sentience because of its character of knowledge, and its state of bliss is declared because of its nature as unbroken happiness.
Close to the Sanskrit
The state of pure consciousness is sentience due to the nature of knowledge, and the state of bliss is spoken of from the nature of unbroken happiness.