Of course, San Diego chooses not to regard the two cities as one. Talk about alter ego: Tijuana was created by the lust of San Diego. Everything that was illegal in San Diego was permitted in Tijuana. When boxing was illegal in San Diego, there were boxing matches in Tijuana; when gambling was illegal, there was always Tijuana.

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.

Jose Vasconcelos, Mexico's great federalist and apologist, has coined a wonderful term, la raza cósmica, "the cosmic race," a new people having not one race but many in their blood.

Those people who say that America is finite are some sense right. The environmental movement, for example, has a great wisdom to it: we need to protect, to preserve, to shelter as much as we need to develop. But I think this always has to be juxtaposed against the optimism of old, which is now represented in part by immigrants. I would like to see America achieve a kind of balance between optimism and tragedy, between possibility and skepticism.

Intimacy is not trapped within words. It passes through words. It passes. The truth is that intimates leave the room. Doors close. Faces move away from the window. Time passes. Voices recede into the dark. Death finally quiets the voice. And there is no way to deny it. No way to stand in the crowd, uttering one's family language.

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.

The fact that we're all hyphenating our names suggests that we are afraid of being assimilated. I was talking on the BBC recently, and this woman introduced me as being "in favor of assimilation." I said, "I'm not in favor of assimilation." I am no more in favor of assimilation than I am in favor of the Pacific Ocean. Assimilation is not something to oppose or favor - it just happens.