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
7. Existence / A. Nature of Existence / 4. Existence as One
The parts of all things are susceptible to change, but the whole is unchangeable
26. Natural Theory / B. Concepts of Nature / 2. The Unlimited
The Boundless cannot exist on its own, and must have something contrary to it
Anaximander introduced the idea that the first principle and element of things was the Boundless
Things begin and end in the Unlimited, and are balanced over time according to justice
The essential nature, whatever it is, of the non-limited is everlasting and ageless