I think of “hope” as just preferring a specific outcome, that doesn’t really require anything more than a preference. “Why go on” is the sort of question that I don’t understand (but often get) from believers. Why wouldn’t we? I don’t feel hopeless or unhappy or unfulfilled without gods or religion, aren’t there other things that give your life worth? Your friends, family, pets, your career, your hobbies, your passions?