Which quote from the text suggests that Holden has begun to recognize that he is unable to stop time and that children cannot remain young and innocent forever?
I went down by a different staircase, and I saw another "Fuck you" on the wall. I tried to rub it off with my hand again, but this one was scratched on, with a knife or something. It wouldn't come off. It's hopeless, anyway. If you had a million years to do it in, you couldn't rub out even half the "Fuck you" signs in the world. It's impossible.
That's the whole trouble. You can't ever find a place that's nice and peaceful, because there isn't any. You may think there is, but once you get there, when you're not looking, somebody'll sneak up and write "Fuck you" right under your nose. Try it sometime. I think, even, if I ever die, and they stick me in a cemetery, and I have a tombstone and all, it'll say "Holden Caulfield" on it, and then what year I was born and what year I died, and then right under that it'll say "Fuck you." I'm positive, in fact.
It was playing it very jazzy and funny. All the kids kept trying to grab for the gold ring, and so was old Phoebe, and I was sort of afraid she'd fall off the goddam horse, but I didn't say anything or do anything. The thing with kids is, if they want to grab the gold ring, you have to let them do it, and not say anything. If they fall off they fall off, but it's bad if you say anything to them.
My hunting hat really gave me quite a lot of protection, in a way; but I got soaked anyway. I didn't care, though. I felt so damn happy all of sudden, the way old Phoebe kept going around and around. I was damn near bawling, I felt so damn happy, if you want to know the truth. I don't know why. It was just that she looked so damn nice, the way she kept going around and around, in her blue coat and all.
Anyway, one time when she went to the ladies' room way the hell down in the other wing D.B. asked me what I thought about all this stuff I just finished telling you about. I didn't know what the hell to say. If you want to know the truth, I don't know what I think about it. I'm sorry I told so many people about it. About all I know is, I sort of miss everybody I told about.