"The ways of men are strange, and hard to learn." (2.398-399)
Okay, so this is Antonio's journey pretty much laid out in one line. He'll spend most of the rest of the book trying to learn the ways of men.
You are but a baby, Antonio, you are our mother's dream. (2.435-436)
Here we get the idea that one of the first major steps toward manhood is leaving the protection of your mother. Which makes sense, if you think about it. How can Antonio ever be himself, if he's always trying to fulfill his mother's dreams?
"You leave my brothers out of this! They are honorable men. They have always treated you with respect." (6.44-45)
As Antonio will learn throughout the novel, to truly be a man, one must act with respect and honor. He learns this from his father, Narciso, and his mother's brothers.