There is no fear that we shall ever in practice have too little call for deliberation — too little need of judicious conjecture. Science does not enable us to dispense with commonsense, but only to employ it more profitably; nor does the best-instructed man necessarily deliberate the less; only he exercises his deliberation on different points from those that occupy the less-instructed; and to better purpose; he does not waste his mental powers in conjectures as to his road, when he has a correct map in his hand; but he still has abundance of other inquiries to make as he travels over it. The adoption of the Arabic numerals and of the Algebraic symbols, does not supersede calculation, but extends its sphere.
Richard Whately, Introductory Lectures on Political Economy (1832), Lecture III.
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Richard Whately
