Most American Hispanics don't belong to one race, either. I keep telling kids that, when filling out forms, they should put "yes" to everything - yes, I am Chinese; yes, I am African; yes, I am white; yes, I am a Pacific Islander; yes, yes, yes - just to befuddle the bureaucrats who think we live separately from one another.

I came from a white middle class neighborhood. Was I expected to go back there and teach the woman next door about Renaissance sonnets? The embarrassing truth of the matter was that I was being chosen because Yale University had some peculiar idea about what my skin color or ethnicity signified.

When the Irish nun said to me, "Speak your name loud and clear so that all the boys and girls can hear you," she was asking me to use language publicly, with strangers. That's the appropriate instruction for a teacher to give. If she were to say to me, "We are going to speak now in Spanish, just like you do at home. You can whisper anything you want to me, and I am going to call you by a nickname, just like your mother does," that would be inappropriate. Intimacy is not what classrooms are about.

Mexicans who come to America today end up opposing assimilation. They say they are "holding on to their culture." To them, I say, "If you really wanted to hold on to your culture, you would be in favor of assimilation. You would be fearless about swallowing English and about becoming Americanized. You would be much more positive about the future, and much less afraid. That's what it means to be Mexican.

It's no surprise that at the same time that American universities have engaged in a serious commitment to diversity, they have been thought-prisons. We are not talking about diversity in any real way. We are talking about brown, black, white versions of the same political ideology.

But America isn't a country of family values; Mexico is a country of family values. This is a country of people who leave home.

I became a writer not because my father was one - my father made false teeth for a living. I became a writer because the Irish nuns who educated me taught me something about bravery with their willingness to give so much to me.