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P. T. Barnum: When a man's undivided attention is centered on one object, his mind will…

When a man's undivided attention is centered on one object, his mind will constantly be suggesting improvements of value, which would escape him if his brain was occupied by a dozen different subjects at once.

In today’s wordsWhen a person's undivided attention is on one thing, his mind keeps suggesting valuable improvements that would escape him if his brain were split among a dozen subjects.

P. T. BarnumSourced
Source
From the book The Art of Money Getting; or, Golden Rules for Making Money, Do Not Scatter Your Powers; first published 1880

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