I am curious from what author? I like the version of the secret of the Golden Flower by Thomas Cleary. He corrects in it some of the translation from the version Jung always had near his bed.

"When one uses this technique (returning the Light) for the first time, one has the impression of a non-being in the being. But once the work is done, when you have a body beyond the body, you have the impression of a being in the non-being."

Chapter III Paragraph 2

Antoine