Ideas from 'books (all lost)' by Anaximander [570 BCE], by Theme Structure

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2. Reason / B. Laws of Thought / 2. Sufficient Reason
The earth is stationary, because it is in the centre, and has no more reason to move one way than another
7. Existence / A. Nature of Existence / 1. Nature of Existence
Anaximander saw the contradiction in the world - that its own qualities destroy it
26. Natural Theory / A. Concepts of Nature / 5. Ultimate Substance / b. The unlimited
The essential nature, whatever it is, of the non-limited is everlasting and ageless
Anaximander introduced the idea that the first principle and element of things was the Boundless
The Boundless cannot exist on its own, and must have something contrary to it
Things begin and end in the Unlimited, and are balanced over time according to justice
27. Natural Reality / D. Activity of Matter / 7. Conservation Laws
The parts of all things are susceptible to change, but the whole is unchangeable