While helping a friend write an essay as part of applying to Harvard Business School, I was introduced to the Finnish term "sisu", which I want to share to end my two month break from writing. Roughly translated, "sisu" is a Finnish concept that refers to the kind of resilience, courage, and tenacity required to survive long Finnish winters and the occasional attack from your eastern enemy (Russia) that has 20x the troops you have. It is not momentary courage, but the ability