for the man of limited intelligence can survey the few and simple relations which lie within reach of his narrow sphere of action, and can control the levers of them with much greater ease than could the eminently intellectual man who commands an incomparably larger sphere and works with long levers.
 Arthur Schopenhauer, The World as Will and Representation (1819). copy citation

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Author Arthur Schopenhauer
Source The World as Will and Representation
Topic intelligence action
Date 1819
Language English
Reference
Note Translated by R. B. Haldane and J. Kemp
Weblink http://www.gutenberg.org/files/40097/40097-h/40097-h.html

Context

“How otherwise could a human race consisting of about eight hundred million individuals have left so much after six thousand years to discover, to invent, to think out, and to say? The intellect is calculated for the support of the individual alone, and as a rule it is only barely sufficient even for this. But nature has wisely been very sparing of conferring a larger measure; for the man of limited intelligence can survey the few and simple relations which lie within reach of his narrow sphere of action, and can control the levers of them with much greater ease than could the eminently intellectual man who commands an incomparably larger sphere and works with long levers. Thus the insect sees everything on its stem or leaf with the most minute exactness, and better than we, and yet is not aware of the man who stands within three steps of it. This is the reason of the slyness of half-witted persons, and the ground of the paradox:” source