The answer lies in a powerful psychological process called ‘superstitious learning’. The brain is constantly looking for associations between two events. While it is mostly correct, it sometimes mistakes coincidence for causality – leading us to attribute success to something as arbitrary as the colour of our notebook or the number of beans in our brew, rather than our own talent or hard work. And when we hear of other’s triumphs, we often end up copying their habits, too, including the arbitrary rituals that they had acquired through superstitious learning – a phenomenon known as ‘over-imitation’.