Continuation of the importance of using a consistent hermeneutic (method of interpretation) for both the first coming of Jesus and the second coming.
Either both types of prophecy are metaphorical (which we know is not true since the prophecies concerning the 1st coming are clearly literal), or they are both literal. This is why the Grammatico-Historical method is vital. It allows us to interpret real/literal things as real/literal while leaving freedom to recognize metaphor, simile, and other nuances of language. Concrete language is meant to be interpreted as concrete language, Ie., 1,000 years means 1,000 years, etc.