- Is it possible that God could have planted that verse in my memory to help me keep my faith through that terrible time in my life?
Sure it is! I myself, at various points in my life, have had certain thoughts and reflections come to my mind based on a current struggle or cross I am dealing with. It's a way that Our Lord manifests His presence in our lives in a quiet, personal way.
When I originally read your question, the first thing that came to my mind was the promise Our Lord gave to St. Faustina about those who recite the Chaplet of Divine Mercy at the hour of their loved one's death and how much Mercy their faithfully-departed loved ones would receive.
Check out these web pages:
"At the hour of their death, I defend as My own glory every soul that will say this chaplet; or when others say it for a dying person, the indulgence is the same."
(Our Lord to St. Faustina from her Diary, 811).
I hope this helps,