Imagine yourself at Victoria Falls, on the border between Zambia and Zimbabwe, a cascade of water more than a mile wide that plummets 350 feet, twice the height and width of Niagara Falls. Or perhaps straining your neck for a long, silent look at Michelangelo’s ceiling in the Sistine Chapel. Or maybe hearing your favorite song for the first time in years, or that moment when the sun crests the horizon at sunrise. According to Dacher Keltner, a leading expert on the biology of human emotion and a professor of…
