This chapter of The Brain and Combat: Brain science in Grappling Competition, is dedicated to the topic of understanding the role that losing a fight plays in building mental resilience. We'll make an inventory of the costs of a competition, some of which are evident right after the fight. We'll also look through the less obvious psychological losses that impact you in the long term. You'll understand the gain that losing offers in the course of self-development, and you'll have the two strongest coping strategies at hand: the way of building an external support system and the way of forming supportive thinking paths.