That "back into lightness" so reminds me of Leonard Cohen
A memory of a familiar line
There is a crack, a crack in everything That's how the light gets in. - Leonard Cohen
— Mark Ainslie (@mark_ainslie) July 9, 2014
and a startling discovery of a much older line at Tumblr
Don’t turn your head.
Keep looking
at the bandaged place.
That’s where
the Light enters you.
- Rumi