After returning home from the pearl buyers' office, Kino and his brother Juan Thomas discuss what has happened. Juan Thomas warns Kino that if he goes to the capital, Kino may meet with only more disappointment. After his brother leaves, Kino hears noises outside; upon looking outside, Kino steps out and is struck on the the head. Cleaning his wound, Juana tells Kino,
Kino, this pearl if evil. Let us destroy it before it destroys us. Let us rush it between two stones. Let us--let us throw it back in the sea where it belongs.
But, Kino looks fiercely at her; against her protests, he declares himself man enought to fend off those who would take it. In order to silence Juana, Kino simply says, "I am a man." When Juana continues her protests, Kino merely answers, "Hush, ... I am a man. "Hush."
Kino is a man like any other man. He will defend what is their property although he has broken "walls." and stepped out of "known and trusted patterns.
he keeps saying he is a man to cover up what he really is, a fool
kino keeps saying that he is a man because he wants juana to know that he is still strong enough to take care of his family.