2 Peter 16 reads, "For we did not follow cleverly devised myths when we made known to you the power and coming of our Lord Jesus Christ, but we were eyewitnesses of his majesty." Peter and his associates didn't make anything up. They told others their eyewitness testimonies, and these testionies are recorded in the Bible. The same goes for the other Apostles, and even the Old Testament prophets. If God didn't want it to be in the Bible, he didn't give the information to his writers.
I heard an explanation of the fall of Lucifer once. There was a scene where God gathered the angels about and explained to them his plan for salvation--the incarnation, death, and resurrection of Jesus Christ. Not only was Lucifer having none of this plan and had a third of the angels rebel with him, the story actually has a scene where Lucifer comes to the meeting late and says something like, "hey everybody, what's happening?" This is a cleverly devised myth, not because of its creativity, but because it succeeds in distracting us from the testimonies about Christ that God has given to us in the Holy Scriptures. We need to eschew any new information given to us from outside the scriptures as something God did not want us to have and that distracts us from Jesus.