A philosopher active around 500 BCE, that wrote a book; this gives us a direct path to his thoughts. He felt that wisdom should be earned, he wrote obscurely, so much so that his book was challenging to read.
He developed a cosmology. His cosmos has no beginning or end and is fundamentally made of fire. This fire can transform to become water, earth, and air. It is always in flux but keeps the elements in proportion. This constant change was the way of everything and was needed to keep the world stable.
Love all, trust a few, do wrong to none.
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