Attentional control is a mental agency tool. Attentional control is your ability to focus on one thought over another. Your inner life is molded by your mindset. When we choose to perceive experiences positively or negatively, those thoughts eventually define and manifest in our character, profoundly influencing how we react and live. You cannot control every event, but you can shape the meaning you give it. Notice the thought darkening your inner life, test it against reality, and choose a steadier one.
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Marcus Aurelius, the Roman Emperor and Stoic philosopher, wrote this around 160 CE in his Meditations (Book 5, Section 16). Although he spoke Latin, Marcus chose Greek—the scholarly language of his day—for his private reflections. He recognized his words and thoughts shaped his mood and character.
In chapter 13 of 30 Philosophers, I recount the story of Zeno and Stoicism to illustrate a similar point:
“He realized it was his mind, and only his mind, that put value on the things he just lost. He realized it was his thoughts of the future, and only his thoughts, that colored his soul dark. He realized it was within his power to reshape his thoughts.”
I love this Marcus Aurelius quote so much, I have it tattooed on my right calf.
This idea lies at the heart of Stoicism: rather than ignoring our feelings, we should understand and reframe them in the context of reality—a sentiment not unlike “fake it until you make it.”
Quote context: Marcus is talking about how your thoughts color your mood and actions.
Source: Meditations (Book 5, Section 16)
Epictetus. The Enchiridion. Translated by George Long. London: George Bell and Sons, 1887. Section 5 teaches that people are disturbed not simply by events, but by the judgments they form about them.
Marcus Aurelius. Meditations. Translated by Maxwell Staniforth. London: Penguin Books, 1964. Book 5, section 16. Describes the mind as taking on the character of its habitual thoughts.
Prestwood, Michael Alan. 30 Philosophers: A New Look at Timeless Ideas. 2024. Chapter 13, “Zeno and Stoicism.” Retells Zeno’s loss as a realization that events do not determine the condition of the mind; thoughts assign value, color the future, and can be deliberately reshaped.
Marcus Aurelius reminds us that our inner life, shaped by thoughts, defines our character.
Michael Alan Prestwood Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
