From Terry Eagleton’s How to Read Literature:
There are many works of literature which are not especially eager to tell us what the protagonist had for breakfast, or what colour of socks his chauffeur wears. The New Testament represents Jesus as a character of sorts, but it has no interest in delving into his mind. Such psychologizing would be irrelevant to its purposes. The work is not intended to be a biography. It does not even tell us what its central character looked like. If they were taking a creative writing course today, the Gospel writers might well find themselves handed a shamefully low grade.