Fortitude embodies the capacity to overcome challenges and persist towards achievement despite adversity. Confidence involves recognizing and managing one's relationship with doubt rather than striving for its absence. Boldness encourages growth by pushing individuals beyond their comfort zones and stimulating innovative thinking. The messaging muscle emphasizes the importance of maintaining a positive and engaged demeanor, especially in leadership roles, to inspire and uplift others during challenging times. Effective decision-making requires self-regulation to combat emotional biases and undisciplined thinking, ensuring high-quality choices. Finally, goal focus is the ability to maintain concentration on essential objectives, disregarding distractions that could derail progress. Together, these six mental muscles—fortitude, confidence, boldness, messaging, decision-making, and goal focus—constitute the foundation of mental strength and high achievement.