। ॥ ६२० ॥
In plain words
In revealing itself or any other object, the sun never needs even the slightest assistance from another light. In knowing itself or the ego, this very essence of consciousness is the supreme Self.
Close to the Sanskrit
In illuminating itself or in illuminating other objects, the sun does not desire another light even slightly. In knowing itself or also in knowing the ego and others, thus indeed is this element of consciousness the supreme Self.