I have found many JW stories from the platform that were stolen from stories originally found in other religions. It never ceases to amaze me how I just accepted that Watchtower was just so wonderful.
There was a quite popular illustration in my area used to explain why it was difficult keeping your children "in the truth." A brother once mentioned it had originated from a CO's talk. Anyhow, the illustration was that a rock could be in a river for thousands of years, but if you cracked it open it was dry. Similarly, a child may have been raised in "the truth" but he/she may not have absorbed it.
Years after I had stopped going to meetings I watched Godfather III for the first time and lo and behold there was a scene featuring the future Pope conveying that same illustration to Michael Corleone almost word for word. Instead of "the truth" he used "christianity." Somehow an illustration from a rated-R movie made it's way onto the platforms of many a kingdom hall.