The is a short summary of the Catholic Church. In a nutshell, the Catholic Church was a development of the “co-mingling” of paganism and Christianity. This article gives a few examples of this reality, with the following excerpt from the article:
Many more examples could be given. These four should suffice in demonstrating the origin of the Catholic Church. Of course, the Roman Catholic Church denies the pagan origin of its beliefs and practices. The Catholic Church disguises its pagan beliefs under layers of complicated theology and church tradition. Recognizing that many of its beliefs and practices are utterly foreign to Scripture, the Catholic Church is forced to deny the authority and sufficiency of Scripture.
With that being said, in the 1500’s there was a man named Martin Luther who was a law student when a very frightening incident in a lightning storm had him so terrified that he vowed to join the monastery if he would be rescued from the situation.