When was the last time you watched a news station that only REPORTED news stories? Today, most recite the key facts in the first minute, then babble seven more 'discussing' it.
"It could mean... (expound on one possibility). Or it might mean.... (further expounding on conjecture #1). Still, another choice is... (blah, blah, blah...)."
It is vital to correctly comprehend and appreciate any factual statement or event. But discussing possibilities does not create an authority.
Pete, Jimmy and Johnny have seen Jesus as He was before there was man. Jesus tells Peter James and John to be tight-lipped. There will no sharing their 'mountain-top' experience. At least not until the Son of Man had risen.
They dismissed the fact that Jesus would, by necessity, die.
But they seized the phrase 'rising from the dead'. And, like our news organizations, started hashing the matter.
What did they know about the dead rising? They had seen Jesus raise a couple, but not sufficient to establish a pattern. And they did not quiz Jesus for more information. And, like our news services, offered no definitive conclusion.
So, what does the phrase mean? Can you solve their dilemma without the New Testament, or historical hindsight? As a minimum, it is hard.
But we do have historical hindsight. And our vision can be 20/20.
Jesus is telling them AGAIN, within a week, he would die and be raised. The first time Peter got hung up on Jesus dying. Now he struggles with 'rising from the dead'.
Are we like Peter? Or do we know just enough to bluff our friends into thinking we are an authority. Why not investigate biblical subjects with your friends, and let God be the authority.