In ROTS, when Palpatine tells Anakin about the tragedy of Darth Plagueis, “The Wise.” He tells Anakin, “It’s not a story the Jedi would tell you. It’s a Sith legend.” Palpatine continues to tell Anakin about Plagueis and his powers and what Plagueis was able to do in order to influence Anakin into learning the ways of the Sith and become Palpatine’s apprentice.
Throughout history, people have claimed to have “special gospels” or “special knowledge” that was hidden or forgotten. A quick Google search will show books such as the “Gospel of Thomas,” the “Epistle of Barnabas,” the “Epistles of Clement,” and others. These all had ingenious reasons for being written. They were not written to share the truth about Jesus but to push a man-made agenda, and we are told in 1 Timothy 4:7a, “Have nothing to do with irreverent, silly myths.”
The problem with “learning” from an apocryphal book from the New Testament is that they are unconfirmed, unaccepted, and often easy to determine hoaxes or forgeries. While the teachings of the “Church” may have changed over the centuries, Scripture is still without error. We must base our theology and worldview on Scripture, not human teachings.
The pre-Resurrection Peter was like that. He had his ideas about what Jesus was here to do and why. We see an example of this in Matthew 16:-21-23.
“Jesus began to show his disciples that He must… suffer many things…be killed, and on the third day be raised. And Peter took Him aside and began to rebuke Him, saying, ‘Far be it from You, Lord! This shall never happen to You.’ But He turned and said to Peter, ‘Get behind Me, Satan! You are a hindrance to Me. For you are not setting your mind on the things of God, but on the things of man.'”
We need to learn from Scripture and not force Scripture to fit our agenda by reading all of what Scripture says on a topic.