Name the poet and poem that pony boy reachted to describe Jay Mountain?

Ponyboy Curtis, from S.E. Hinton's novel "The Outsiders", reaches for a poem to describe Jay Mountain, but he doesn't actually quote it. Instead, he references the poem "Ode to a Nightingale" by John Keats.

He says, "It was like that poem, that 'Ode to a Nightingale' or something. I don't remember the words, just the feeling. You know, like you're on top of the world, and nothin' can touch you."

So, while Ponyboy doesn't directly quote the poem, he uses it as a point of reference to convey his emotional state and the feeling he gets while looking at Jay Mountain.