"WhatsApp will bring Facebook another billion users. We will be a billion-user product. Whether there is a direct valuation or an indirect valuation, there is value, and Facebook understands that well."

"WhatsApp provides phone-number-based messaging, and people asked, 'Isn't that what SMS is?' Yes, but SMS is expensive, antiquated, and what WhatsApp did was modernize and level that playing field. For example, in Europe, if France wants to talk to Belgium, it's extraordinary costly because of border and telecom charges."

"Yes, I was a big math and computer geek, that's true. I was driven by the scholastic side of things. For me, it was all about what I could do with math and computers."

"People want chat histories. They're a permanent testimony of a relationship."

"The relationship with a live audience seems to me to count for more."

"Wisdom principle 26 tells us that the journey of life is lesson 59."

"It is a radiant truth that wisdom is the quiet art of recognizing what can be changed and releasing what cannot — an essential principle for the reflective life."

"I think first and foremost everybody should understand that Canadians are strongly committed to the system of universal health insurance, to the principle that your ability to pay does not determine your access to critical medical service."