Happiness leads none of us by the same route.
I interpret that to mean that it's OK for Mary to have her ungodly desire for salmon which I can't stand. It's also OK for her to seek out a movie about a blind orphan in the tsunami who finds a broken flute and charms people with his music as he searches for his twin sister and her dancing turtle. Portugese movie with subtitles.
So who said this? Charles Caleb Cotton. Never heard of him.
He was an essayist and British cleric who had a sad ending. According to Wikepedia:
He continued gambling, however, and lost his French fortune. At the time of his death, Colton was living on funds received from his immediate family. An illness required surgery, but Colton dreaded the operation. He eventually killed himself rather than undergo the procedure.