" The researchers discovered that money is indeed a major factor in day-to-day happiness. No surprise there. You need to make a certain amount, on average, to be able to afford food, shelter, clothing, entertainment, and the occasional Apple product, but what spun top hats around the country was their finding that, beyond a certain point, your happiness levels off. The happiness that money offers doesn’t keep getting more and more potent—it plateaus. The research showed that a lack of money brings unhappiness, but an overabundance does not have the opposite effect. "

― David McRaney , You Are Now Less Dumb: How to Conquer Mob Mentality, How to Buy Happiness, and All the Other Ways to Outsmart Yourself