Marcus Aurelius

The quote “He who lives in harmony with himself lives in harmony with the universe” is often attributed to Marcus Aurelius (121–180 CE), a Roman emperor and Stoic philosopher known for his personal writings collected in Meditations. These reflections, originally intended as his private notes, convey the Stoic ideals of self-discipline, rationality, and inner harmony. In Meditations, he emphasized accepting one’s role in the larger order of the universe, cultivating inner peace, and embracing virtues like patience and resilience.

However, while this quote aligns with the Stoic principles Marcus Aurelius espoused, it does not appear directly in Meditations or any verified ancient sources attributed to him. It is likely a paraphrase or a later interpretation of his teachings rather than a direct quote.