We will continue to live in a form in which we become cyborg. Either we download our information to a machine or we incorporate so many machine parts that we don't know where we end and the machine begins.

Teenagers talk about the idea of having each other's 'full attention.' They grew up in a culture of distraction. They remember their parents were on cell phones when they were pushed on swings as toddlers. Now, their parents text at the dinner table and don't look up from their BlackBerry when they come for end-of-school day pickup.

These days, when people are alone, or feel a moment of boredom, they tend to reach for a device. In a movie theater, at a stop sign, at the checkout line at a supermarket and, yes, at a memorial service, reaching for a device becomes so natural that we start to forget that there is a reason, a good reason, to sit still with our thoughts: It does honor to what we are thinking about. It does honor to ourselves.

Teenagers would rather text than talk. They feel calls would reveal too much.

As we distribute ourselves, we may abandon ourselves.

If behind popular fascination with Freudian theory there was a nervous, often guilty preoccupation with the self as sexual, behind increasing interest in computational interpretations of mind is an equally nervous preoccupation with the self as machine.

Networked, we are together, but so lessened are our expectations of each other that we can feel utterly alone. And there is the risk that we come to see others as objects to be accessed—and only for the parts we find useful, comforting, or amusing.