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Of all the frictional resistances, the one that most retards human movement is ignorance, what Buddha called 'the greatest evil in the world.' The friction which results from ignorance ... can be reduced only by the spread of knowledge and the unification of the heterogeneous elements of humanity. No effort could be better spent.

— Nikola Tesla

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More quotes by Nikola Tesla

Let the future tell the truth and evaluate each one according to his work and accomplishments. The present is theirs; the future, for which I really worked, is mine.

Ere many generations pass, our machinery will be driven by a power obtainable at any point of the universe.

Money does not represent such a value as men have placed upon it. All my money has been invested into experiments with which I have made new discoveries enabling mankind to have a little easier life.

Today's scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality.

I have harnessed the cosmic rays and caused them to operate a motive device.

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Quote text and notes from Wikiquote: Nikola Tesla (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.