In Marcus Aurelius' Meditations, he emphasizes the importance of self-governance in one's thoughts and choices. Understanding how one's reasoning operates is crucial, as it serves as the foundation for all decision-making. The essence of a fulfilled life lies not in external circumstances, which are unpredictable and often out of our control, but in our ability to manage and direct our internal reasoning. When we become aware of how our minds function, we can navigate life with more clarity and purpose.

The quote underscores a stoic belief that everything we perceive as significant outside of our rational mind is ultimately transient and insubstantial. Decisions and perceptions divorced from thoughtful reasoning are like mere illusions or empty shells. By focusing on nurturing our inner faculties and exercising our judgment, we gain true empowerment, finding meaning amidst the chaos of external events. Our ruling reason, therefore, is the real source of strength and understanding in our lives.