Not only was nature, man, fact and principle suggestive to Mr. Lincoln, not only had he accurate and exact perceptions, but he was causative, i. e., his mind ran back behind all facts, things and principles to their origin, history and first cause, to that point where forces act at once as effect and cause. He would stop and stand in the street and analyze a machine. He would whittle things to a point, and then count the numberless inclined planes, and their pitch, making the point. Mastering and defining this, he would then cut that point back, and get a broad transverse section of his pine stick, and peel and define that. Clocks, omnibuses and language, paddle-wheels and idioms, never escaped his observation and analysis. Before he could form any idea of anything, before he would express his opinion on any subject, he must know it in origin and history, in substance and quality, in magnitude and gravity. He must know his subject inside and outside, upside and down side. He searched his own mind and nature thoroughly, as I have often heard him say. He must analyze a sensation, an idea, and words, and run them back to their origin, history, purpose and destiny. He was most emphatically a remorseless analyzer of facts, things and principles. When all these processes had been well and thoroughly gone through, he could form an opinion and express it, but no sooner. He had no faith. "Say so's" he had no respect for, coming though they might from tradition, power or authority. All things, facts and principles had to run through his crucible and be tested by the fires of his analytic mind; and hence, when he did speak, his utterances rang out gold-like, quick, keen and current upon the counters of the understanding. He reasoned logically, through analogy and comparison. All opponents dreaded him in his originality of idea, condensation, definition and force of expression, and woe be to the man who hugged to his bosom a secret error if Mr. Lincoln got on the chase of it. I say, woe to him! Time could hide the error in no nook or corner of space in which he would not detect and expose it. [Transcriber's Note: Part of this was omitted in original.]