We miss extra bits of knowledge that can add value to our lives. We sort of lack empathy because we're multitasking all the time.

I'm not a fan of the selfie. I think it's at the heart of the narcissism that social media brings into our lives.

It's funny: I spend time in the book criticizing social media, but I'm also aware that a lot of my success is because of social media. I can broadcast myself and my work to thousands of people that are following me or my friends. I do think that social media can be good for self-promotion.

If I post a selfie, and you like it, it's of little cost to you, but it feels great to me. That becomes addictive, and you see people's narcissism so quickly. I think that's a very dangerous thing for us all to be addicted to.

We're all not exactly the same person online that we are in real life. I am not as happy as my Instagram makes me look. We are all heightening the positives and downplaying the negatives.

One of the things that makes a social-media cleanse so difficult is that every time we log on, every notification we get is an addictive substance. It's just like any drug.

It becomes very difficult for us to adjust to a world without social media because we spend so much time involved with it.