How we cite our quotes: All quotations are from Rain Man.
Quote #4
CHARLIE: … I'm sorry about that. I got a little carried away. I got a little hot, okay, Ray? I'm sayin' that I'm sorry, and I just want you to know that I am sorry. I'm apologizing. I got a little carried away. The money. I got a little greedy.
There are a couple of things going on here. On the surface level, Charlie is simply apologizing for turning Ray loose on the roulette wheel, where they lost… but really, on a much more profound front, he's apologizing for getting "hot" and "greedy" the entire movie, when he was being impatient with Ray and using him as a bargaining chip to get money out of Doctor Bruner.
Quote #5
CHARLIE: It's funny, I just realized I'm not pissed off anymore. My father cut me out of his will. You were his friend, you probably knew he tried to contact me a few times over the years. I never called him back. I was a prick. And hey, if he was my son and didn't return my calls, I'd have written him out, f*** him.
Charlie also takes some more blame when he talks to Doctor Bruner about his relationship with Ray/his father. Even though he's still fighting to keep Ray at this point, now it's for the right reasons—and he tells Bruner that he's no longer trying to fight his father's will, having accepted that his dad had every reason to be legit upset with him. Again: a big sign of growth in Charlie's character.