People
No one ever told me that grief felt so like fear.
— C.S. Lewis • A Grief Observed

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker discovers that grief resembles fear more closely than expected. The surprise matters as much as the comparison: nothing previously heard had prepared the speaker for that resemblance. The line captures loss as an unfamiliar experience that unsettles assumptions about what sorrow feels like.
Context reviewed