"life is pain," his mother said. "anybody that says different is selling something." explain this quotes from the princess bride book

Fezzik is quite huge and quite powerful. He’s really a rather sensitive soul at heart, but his size is perfect for making money in the national sport of his homeland, Turkey. That sport is fighting. Fezzik’s mom and dad are quite eager to see some of the big money that is to be made in the fighting racket in Turkey. When Fezzik asserts that he does not want to fight because he is afraid the opponent will hurt him, his mother doles out the above maternal advice. The darkness of such a truth issuing forth from his mother and not his father—or, for that matter, from any parent to their child—is highly suggestive of the much darker character of the book version of The Princess Bride over its rather mindlessly sunny cinematic counterpart.