People think they understand things because they become familiar with them. This is only superficial knowledge. It is the knowledge of the astronomer who knows the names of the stars, the botanist who knows the classification of the leaves and flowers, the artist who knows the aesthetics of green and red. This is not to know nature itself—the earth and sky, green and red. Astronomer, botanist, and artist have done no more than grasp impressions and interpret them, each within the vault of his own mind. The more involved they become with the activity of the intellect, the more they set
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