" The political strategists James Carville and Paul Begala tell a story about the choice a lion faces in deciding to hunt for a mouse or an antelope. “A lion is fully capable of capturing, killing, and eating a field mouse,” they explain. “But it turns out that the energy required to do so exceeds the caloric content of the mouse itself.” Antelopes, in contrast, are much bigger animals, so “they take more speed and strength to capture.” But once captured, an antelope can provide days of food for the lion. "

― Ozan Varol , Think Like a Rocket Scientist: Simple Strategies You Can Use to Make Giant Leaps in Work and Life