Book excerpt: Often translated as resilience or perseverance, the Finnish concept of sisu is about never giving up, even when a task is seemingly impossible. Considered a hot topic of popular psychology, sisu is regarded as having a positive impact on mental health. At the heart of sisu is the idea of getting back up from failures, whether that be losing a job or the end of a relationship, and having the courage to use that experience to further oneself. Running a marathon and feel like you've hit a wall? Got a business idea but too scared to try it? Channelling sisu can be the key to overcoming both mental and physical blocks. Although a Finnish concept, this book explains how anyone can embrace sisu and channel their inner courage to make the most of any situation.