। ॥ ८८४ ॥
In plain words
The first absorption, external in kind, is simply abiding as one's own essential nature, apart from the Brahman whose very form is being, consciousness, and bliss.
Close to the Sanskrit
The external first samadhi is the mere grasping of one's own essential form. The ascetic from the Brahman of the nature of existence-consciousness-bliss...