Invest in people who will take care of you when you're old.

Virtual simulations allow post-traumatic stress disorder sufferers to re-experience the events that traumatized them, and then slowly desensitize themselves to their impact through repeated recreations involving not just sight and sound but even smell.

Digital technology is both arousing and distancing. We don't look at the users on the other side as people. They aren't - they're just usernames, Facebook photos and Twitter handles.

The tribal community lived in the totality of circular time; the farmers of God's universe understood before and after; workers of the clockwork universe lived by the tick; and we creatures of the digital era must relate to the pulse.

We all know the feeling of surrendering to the embedded biases of our devices. We let our cell phones ping us every time there's an incoming message and check our e-mail even when we'd best pay attention to what's going on around us in the real world. We text while driving.

Our fear of technology is really a fear of empowerment. We now have the ability to design the reality we live in, and we have to step up to the occasion.

The true end users of Facebook are the marketers who want to reach and influence us. They are Facebook's paying customers; we are the product. And we are its workers. The countless hours that we - and the young, particularly - spend on our profiles are the unpaid labor on which Facebook justifies its stock valuation.