I have to say that Robert A Heinlein's book found a place in my heart. He was a preacher in every way, but he just didn't know what religion he was.
Verhoeven made the first movie which was vaguely related to the book, in the sense that they used the same words. The second movie was, honestly, nasty, but the third movie is a piece of excrement that tools cannot be used to hide. Look after yourself and your loved ones and read Robert's book and stay away from these nasty movies.