reader can ask in an author is a certain similitude to nature. He never looks for anything more than what is called vraisemblance or plausibility. What seems to he true satisfies him as well as what is true.
How opposite to this the mental discipline and research required of the scientist! No illusions or half-truths can ever satisfy his mind. Engaged in prolonged labors to find out the laws of natural phenomena, he counts nothing as gained so long as these remain undiscovered. One after another chimeras vanish from his mind; theories are tried, only to be discarded, if found not to fit in with facts; verifications from many opposite quarters are applied to test the value of a given hypothesis; and, if, after all, any of them are seen to be at variance with it, the hypothesis is abandoned, though it may have been cherished with all the ardor of a first and only affection.
That the semblance of truth answers the purpose of almost every kind of literature, as well as the reality, and thus places it in marked contrast with the rigid requirements of science, is further manifest from this, that we often see two propositions or apothegms, entirely repugnant to each other, equally applauded by the multitude, and maintaining a place and a good character in current literature; while of two rival theories or doctrines in science, either both are sooner or later rejected, or they become reconciled, or one is finally substantiated. Every one's reading, if at all extensive, will readily suggest illustrations of the truth of this remark. A few of these inconsistencies or contradictions in literature may not be out of place here. First, we will compare what is said by two distinguished philosophers upon the subject of anger. "To be moved by passion," says Marcus Aurelius, "is not manly, but mildness and gentleness, as they are more agreeable to human nature; so, also, are they more manly; and he who professes these qualities possesses strength, nerve, and courage—and not the man who is subject to fits of passion and discontent. For in the same degree in which a man's mind is nearer to freedom from all passion, in the same degree also is it nearer to strength. And as the sense of pain is a characteristic of weakness, so also is anger. For he who yields to pain and he who yields to anger are both wounded, and both submit." On the other hand, Bacon: "To seek to extinguish anger utterly is but a bravery of the Stoics. We have better oracles. . . . In refraining from anger, it is the best remedy to win time, and to make a man's self believe that the opportunity of his revenge is not yet come; but that he foresees a time for it, and so to still himself, in the mean time, and reserve it." Next, hear what two others of the same guild have to advise us concerning knowledge: "It is a vanity to waste our days in the blind pursuit of knowledge; it is but attending a little longer, and we shall enjoy that by instinct and infusion which we endeavor at here by labor and inquisition. It is better to sit down in a modest ignorance, and rest contented with
