What are some quotes that describe Ponyboy's traits from The Outsiders?

Oh I MUST add a very important quote by both Ponyboy and
Robert Frost here!  In my opinion, Ponyboy reciting "Nothing Gold Can Stay" to Johnny
and, of course, discussing the poem with Cherry Valence, shows Ponyboy to also be a
sensitive, thoughtful, intelligent, and introspective young
man.

Let's look at the poem Ponyboy recites and how it
shows the above qualities:

readability="7">

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.

Probably one of Robert
Frost's most famous (and most memorized poems), Ponyboy recites this to Johnny as they
share their thoughts while running from the law.  Sunset and sunrise are such brief
times of day.  Brief, but beautiful.  Ponyboy proves himself THOUGHTFUL as he reflects
on this brief beauty in nature.  The fact that this exact beauty and thought remain with
him for a lifetime (and that he would share them with a special girl) prove him
SENSITIVE.  The fact that Ponyboy can simply memorize this poem and recite it again and
again, with emphasis (and analysis!), proves him INTELLIGENT.  And, finally, the fact
that he can compare the gold of a sunrise or sunset to his own life, and even the lives
of his buddies such as Johnny and Dally, prove him to be
INTROSPECTIVE. 

As Johnny is dying, these are the reasons
why he tells Ponyboy to "stay gold."  It is a beautiful sentiment from one friend to
another unifying them in character, especially in regards to the traits mentioned
above.