"Nothing Gold Can Stay" was written by Robert Frost. The text is as follows:
Nature’s first green is gold,
Her hardest hue to hold.
Her early leaf’s a flower;
But only so an hour.
Then leaf subsides to leaf.
So Eden sank to grief,
So dawn goes down to day.
Nothing gold can stay.
The early lines of this poem are set in spring. The speaker notes that the "first green" that appears is "gold," meaning that it is valuable and precious. Spring is linked with new life and innocence. However, as beautiful as that time is, nature cannot hold on to it for long. The first signs that leaves are emerging often appear as "a flower." In my area, we have dogwood trees that capture this imagery
well. When they bloom, the woods around my house turn a fluffy white. But this beauty only lasts for "an hour."
This period of innocence is then linked through allusion
to the Garden of Eden, when all innocence was lost when humans disobeyed God's instruction. The speaker concludes with the titular line: Nothing gold can stay. In other words, innocence and beauty cannot last forever.
believes that Pony is "gold," as evidenced by his letter:
I've been thinking about it, and that poem, that guy that wrote it, he meant you’re gold when you’re a kid, like green. When you're a kid everything's new, dawn. It's just when you get used to everything that it's day. Like the way you dig sunsets, Pony. That's gold. Keep that way, it’s a good way to be.
But Johnny is gold as well. He overcomes parents who don't seem to care much about him and doesn't let this harden his perspective. He always remains a steadfast friend to Pony. He also proves himself a hero by rescuing the children from the burning church. Just like the poem, Johnny's life only lasts an "hour," as he dies as a result of his heroic efforts, but while he lives, Johnny proves to be one of the golden humans who grace the planet.