SISU is a Finnish concept that embodies determination, resilience, and courage in the face of adversity. It reflects a mindset of perseverance, encouraging individuals to push through challenges and maintain a strong will, even when circumstances are tough. The term is often associated with the Finnish spirit and culture, highlighting the importance of grit and tenacity. Rooted in Finnish history, SISU has been a guiding principle during difficult times, such as wars and economic hardships. It emphasizes the ability to confront obstacles head-on and to keep striving for success, making it a significant aspect of Finnish identity and values.