Last First and First Last

Why was it asked 'will few be saved'? What is it to be fatalistic? Why does the LORD command to agonize to enter into the 'Straight Gate'? Why do some try to command God? Why will flesh cry to open the Door? Why do those given life agonize over who they are and what they are? Who crucified the LORD Jesus Christ and why? How do we see that being taught of Christ doesn't mean that you are Christ's? How do we see that some believe Christ is revealed in them but He is not? Who are the 'thieves and robbers' Christ speaks of? Why did Paul say that he was wretched? What did the LORD mean by the last shall be first and the first last?