। ॥ ८२३ ॥
In plain words
Let go of being the one who knows, and of everything that comes with it. What remains is a firm, unshaken resting in the Knowable alone. That state of the mind, with no distinctions left in it, is nirvikalpa samādhi — the one they call yoga.
Close to the Sanskrit
Having cast off the notion of being a knower and the rest, the firm abiding in the Knowable alone — that would be the mind's distinctionless samādhi, designated as yoga.