
The search for harmonic relationships in the natural world motivated Kepler's scientific investigations.
We can explore this aspect of his thought in his 1611 essay On the Six-Cornered Snowflake and his larger work The Harmony of the World.
We can also use Kepler's work as a point of departure to investigate the subject of the Divine Proportion ("Golden section"). We will explore the influence on Kepler of Nicholas of Cusa, who Kepler called "divine."

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