parallel to the philosophical quest throughout history has been the search to understand the effects of colour and sound. plato in his republic ascribed very specific effects and meanings to the seven modes of ancient greek music for example, indicating which modes were good for education, order, and well-being.

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Parallel to the philosophical quest throughout history has been the search to understand the effects of colour and sound. Plato in his Republic ascribed very specific effects and meanings to the seven modes of ancient Greek music for example, indicating which modes were good for education, order, and well-being.