The ones who are preoccupied by logic are above all; to read their works, one is tempted to believe they have advanced only step by step, after the m… - Henri Poincaré

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The ones who are preoccupied by logic are above all; to read their works, one is tempted to believe they have advanced only step by step, after the manner of a Vauban who pushes on his trenches against the place besieged, leaving nothing to chance. The others are guided by intuition and, at the first stroke, make quick but sometimes precarious conquests, like bold cavalrymen of the advance guard.