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All the great advances are at first purely theoretical, and are only afterwards found to be capable of practical applications. And even if some splendid theory never has any practical use, it remains of value on its own account ; for the understanding of the world is one of the ultimate goods. If science and organization had succeeded in satisfying the needs of the body and in abolishing cruelty and war, the pursuit of knowledge and beauty would remain to exercise our love of strenuous creation.
Source: On Education, especially in early childhood, 1926, by Bertrand Russell
More info.: https://russell-j.com/beginner/OE18-080.HTM