Belief in the truth commences with the doubting of all those truths we once believed.

The Roman Curia has its defects, but it seems to me that people often overemphasize its defects and talk too little about the health of the many religious and laypeople who work there.

Often, people just don't see what I see. They have too much doubt. You can't do your best when you're doubting yourself. If you don't believe in yourself, who will?

The main Facebook usage is so big. About 20 percent of the time people spend on their phone is on Facebook.

My friends are people who like building cool stuff. We always have this joke about people who want to just start companies without making something valuable. There's a lot of that in Silicon Valley.

I think what we've found is that when you can use products with your friends and your family and the people you care about, they tend to be more engaging. I think that we're really going to see this huge shift where a lot of industry is and products are just going to be remade to be social.