The Stoics were ancient philosophers who believed in the importance of self-control and rational thinking. They taught that we should focus on what we can control and accept what we cannot. This mindset helps people find peace and happiness, even in difficult situations. Key figures in Stoicism include Seneca, Epictetus, and Marcus Aurelius. At the heart of Stoicism is the idea that emotions should be guided by reason. Stoics practiced techniques like mindfulness and reflection to manage their feelings. By doing so, they aimed to live virtuous lives and maintain inner calm, regardless of external circumstances.