I think some parts of the Bible are there to make us think about the questions, not to provide the answers.
For example:
2 Peter 3:4-- "They will say, 'Where is this 'coming' he promised? Ever since our ancestors died, everything goes on as it has since the beginning of creation.' "
Would people be saying this if some crazy preacher didn't plant the idea of a specific date (say 1844 or 1997 - JW's aren't the only ones that make nutjob predictions) in their minds.