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New knowledge is the chief cause of progress, and without it the world would soon become stationary. It could continue, for a time, to improve by the diffusion and wider use of existing knowledge, but this process, by itself, could not last long. And even the pursuit of knowledge, if it is utilitarian, is not self-sustaining. Utilitarian knowledge needs to be fructified by disinterested investigation, which has no motive beyond the desire to understand the world better.
Source: On Education, especially in early childhood, 1926, by Bertrand Russell
More info.: https://russell-j.com/beginner/OE18-080.HTM