For every person who believes that luck exists, there are many others who say they are skeptical or that only bad luck rules. The irony is that many who say they don't believe in good fortune or having a lucky break often end up unable to explain the repeated unusual combinations of everyday events. Inevitably, everyone has gone through stages of luck or misfortune in the most varied aspects of life.

There is an anonymous phrase -attributed to athletes, gurus, thinkers, and authors of self-help books- that says: "The more you train, the luckier you get". It may seem like a mere cliché, but this is basically the way science finds to explain that, in the face of random events in life, there is a force very similar to luck. And that it is possible to become, in practice, a more "lucky" person. Linked to luck are fortune and destiny, topics that are analyzed in this book.