“People ask, “Have you ever seen the gods you worship? How can you be sure they exist?” Answer: Just look around you. I’ve never seen my soul either. And yet I revere it. That’s how I know the gods exist and why I revere them — from having felt their power, over and over.”
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Meditations, 12.28, Translated by Gregory Hays, The Modern Library (X)
Marcus Aurelius, Marble, Second century CE. Collection of the Antalya Archaeological Museum. Photo: G.dallorto, 2006 via Wikimedia Commons (X). License: Any purpose with attribution