“Impact is rewarding. Mattering makes us happy.”

“If someone offered you a pill that would make you permanently happy, you would be well advised to run fast and run far. Emotion is a compass that tells us what to do, and a compass that perpetually stuck on north is worthless.”

“The fact that we often judge the pleasure of an experience by its ending can cause us to make some curious choices.”

“People want to be happy, and all the other things they want are typically meant to be a means to that end.”

“We live in a world in which people are censured, demoted, imprisoned, beheaded, simply because they have opened their mouths, flapped their lips, and vibrated some air. Yes, those vibrations can make us feel sad or stupid or alienated. Tough shit. That's the price of admission to the marketplace of ideas. Hateful, blasphemous, prejudiced, vulgar, rude, or ignorant remarks are the music of a free society, and the relentless patter of idiots is how we know we're in one. When all the words in our public conversation are fair, good, and true, it's time to make a run for the fence.”

“Psychologists call this habituation, economists call it declining marginal utility, and the rest of us call it marriage.”

“The belief-transmission network of which we are a part cannot operate without a continuously replenished supply of people to do the transmitting, thus the belief that children are a source of happiness becomes a part of our cultural wisdom simply because the opposite belief unravels the fabric of any society that holds it.”