। ॥ २८५ ॥
In plain words
Keep at it — with full attentiveness, mind gathered and steady — until the very sense of 'I' attached to this body dissolves completely, without a trace left. Remove your own self-superimposition.
Close to the Sanskrit
Until the complete dissolution of the notion 'I' with respect to this body, with attentiveness, [being] one whose mind is disciplined, accomplish the removal of self-superimposition.