One piece 1048 spoiler
Luffy: I'm grateful, Shanks. I've heard everything from Makino.
Shanks: *Cries*
Luffy: You fought for me, right? STOP CRYING, AREN'T YOU A MAN!?
Shanks: B-But.... Luffy.... MY ARM!!
Luffy: IT'S JUST AN ARM! THAT'S NOTHING! Be grateful that i'm alright
Shanks: Uwaaaaaaaahhhhhhhh!!!
[Luffy understood why Shanks wouldn't take him out to sea. The dangers of the sea and his own lack of strength. But most of all, Luffy realized how weak Shanks was as a man and thought that he doesn't want to become like him from the bottom of his heart]