Stoic philosophy, an ancient Greek school of thought founded in the early 3rd century BC by Zeno, teaches the practice of self-discipline and resilience as a way to overcome harmful emotions. The school of thought maintains that moral excellence, the supreme good, is based on wisdom and that the enlightened exist in harmony with the universal Reason that rules the universe. This congruent existence involves embracing the moment as it presents itself, not letting oneself to be controlled by the craving for gratification or dread of discomfort.

At its core, Stoic philosophy imparts that outside events are not within our control; we can only control our answers to them. This mindset promotes grit and emotional equanimity, enabling persons maintain inner calm amidst life's obstacles. The Stoic investment philosophy practice of mindfulness, or "prosoke," entails constant vigilance and focus to one’s thoughts and actions, ensuring they conform with rationality and virtue. Famous Stoic thinkers such as Marcus Aurelius, Epictetus, and Seneca have bequeathed irreplaceable wisdom that remain influential in modern thought and self-improvement methods.

The principles of Stoicism's stress on logic and self-discipline provides a useful structure for self-improvement. By concentrating on what we can influence and acknowledging what we cannot, Stoics believe we can achieve tranquility and a satisfying life. This ideology's enduring wisdom gives insight on managing difficulties, regulating emotions, and living ethically. Through the cultivation of virtues like wisdom, courage, justice, and temperance, Stoicism empowers people to live lives of meaning and honor, despite outside conditions.