“Studies show that in a phenomenon called "emotional contagion," we unconsciously catch emotions from other people--whether good moods or bad ones. Taking the time to be silly means that we're infecting one another with good cheer, and people who enjoy silliness are one third more likely to be happy.”

“It seemed the world was divided into good and bad people. The good ones slept better... while the bad ones seemed to enjoy the waking hours much more.”

“I will say that all it takes is one group of wrong-minded people with a bad idea that, in retrospect, sounded like a good one at the time.”

“Fear is an inhibitor that has kept more people from fulfilling their destiny than any other one emotion.”

“Human beings are strange creatures. As people come across one another they produce various outcomes. Good things, sometimes. And other times, bad.”

“Mimicry, they argue, is also one of the means by which we infect each other with our emotions. In other words, if I smile and you see me and smile in response—even a microsmile that takes no more than several milliseconds—it’s not just you imitating or empathizing with me. It may also be a way that I can pass on my happiness to you.”