Apostasy and departing from the faith is not what you think it is and you do not have a good understanding about the promises of God that every believer has been given no matter what level of growth or maturity they have. If you look at all those men and women of faith and what took place in their lives and you come to (Heb 11:29) and find out that they never received the promise. Why was Rahab in this chapter mentioned as Rahab the harlot who never perished with those who believed not? There is no other Rahab specifically mentioned in scripture having to do with a person so the reference to her as 'harlot' was not made to identify her separate from other Rahabs. You will not find a reference to her without the tag or label 'harlot' attached to her name. I wonder why the Holy Spirit made it so in the scriptures both in the Old and New testaments? You have a Bible, read what it says about Rahab the harlot!