Sogol’s aim was to measure the power of thought as an absolute value. “This power,” said Sogol, “is arithmetical. In fact, all thought is a capacity … - René Daumal

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Sogol’s aim was to measure the power of thought as an absolute value.
“This power,” said Sogol, “is arithmetical. In fact, all thought is a capacity to grasp the divisions of a whole. Now, numbers are nothing but the divisions of the unity, that is, the divisions of absolutely any whole. In myself and others, I began to observe how many numbers a man can really conceive, that is, how many he can represent to himself without breaking them up or jotting them down: how many successive consequences of a principle he can grasp at once, instantaneously; how many inclusions of species as kind; how many relations of cause and effect, of ends to means; and I never found a number higher than four. And yet, this number four corresponded to an exceptional mental effort, which I obtained only rarely. The thought of an idiot stopped at one, and the ordinary thought of most people goes up to two, sometimes three, very rarely to four.