It’s not directly focused on mental toughness but I think it indirectly explores the themes of mental toughness: Marcus Aurelius’ “Meditations”. Really any tex

It’s not directly focused on mental toughness but I think it indirectly explores the themes of mental toughness: Marcus Aurelius’ “Meditations”. Really any text that explores Stoicism by it’s very nature also explores the different aspects of your mind that people traditionally refer to as “mental toughness”