। ॥ ५४ ॥
In plain words
entered it as the Jīva, the individual being—and that supreme Ātman is you. You are Sat-Cit-Ānanda itself: Being, Consciousness, and Bliss. You have only forgotten the Supreme as your own Self.
Close to the Sanskrit
having entered in the form of the Jīva, that very supreme Ātman is you. You are Sat-Cit-Ānanda—Being, Consciousness, and Bliss—alone, having forgotten the Supreme as your own Ātman.