I have read this phrase in a Book(American Gods): “If you are to survive, you must believe"
And it sounds very strange to me.
I actually didn't get the actual meaning of the phrase.
This sentence: "If you are to survive" feels like it's lacking a word.
I believe the missing word is "willing" but I hope someone could explain why the writer chose to suppress this word, and if this is a grammatically correct phrase.