“"There is one basis of science," says Descartes, "one test and rule of truth, namely, that whatever is clearly and distinctly conceived is true." A profound psychological mistake. It is true only of formal logic, wherein the mind never quits the sphere of its first assumptions to pass out into the sphere of real existences; no sooner does the mind pass from the internal order to the external order, than the necessity of verifying the strict correspondence between the two becomes absolute. The Ideal Test must be supplemented by the Real Test, to suit the new conditions of the problem.”
Quote by George Henry Lewes

George Henry LewesGeorge Henry Lewes was a British philosopher, literary critic, and writer. Born on April 18, 1817, and died on November 28, 1878, Lewes is known for his contributions to moral philosophy, aesthetics, and literary criticism. more
“Roger_Bacon" title="Roger Bacon">Roger Bacon expressed a feeling which afterwards moved many minds, when he said that if he had the power he would burn all the works of the Stagirite, since the study of them was not simply loss of time, but multiplication of ignorance. Yet in spite of this outbreak every page is studded with citations from Aristotle, of whom he everywhere speaks in the highest admiration.”
“Roger Bacon, a disciple of the Arabs, also insisted on the primary necessity of Mathematics, without which no other science can be known; yet by Mathematics it is clear that he meant something very different from what we mean, including under that head even dancing, singing, gesticulation, and performance on musical instruments.”
Source: The History of Philosophy from Thales to Comte
“Science as we now understand the word is of later birth. If its germinal origin may be traced to the early period when Observation, Induction, and Deduction were first employed, its birth must be referred to that comparatively recent period when the mind, rejecting the primitive tendency to seek in supernatural agencies for an explanation of all external phenomena, endeavoured, by a systematic investigation of the phenomena themselves to discover their invariable order and connection.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings
“The separation of Science from Knowledge was effected step by step as the Subjective Method was replaced by the Objective Method: i.e., when in each inquiry the phenomena of external nature ceased to be interpreted on premisses suggested by the analogies of human nature.”
Source: Aristotle: A Chapter from the History of Science, Including Analyses of Aristotle's Scientific Writings
“He who is ignorant of Motion, says Aristotle , is necessarily ignorant of all natural things. ...Not only was he entirely in the dark respecting the Laws, he was completely wrong in his conception of the nature of Motion. ...He thought that every body in motion naturally tends to rest.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings
“To write much, and to write rapidly, are empty boasts. The world desires to know what you have done, and not how you did it.”
Source: The Spanish Drama. Lope de Vega and Calderon
“The spontaneous tendency to invoke a Final Cause in explanation of every difficulty is characteristic of metaphysical philosophy. It arises from a general tendency towards the impersonation of abstractions which is visible throughout History.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings
“To his [ Plato's ] great disappointment, he found Anaxagoras adducing simple physical reasons, instead of the teleological reasons, which he had expected. Such a teacher could no longer allure him.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings
“Pliny... makes the statement, and for untrustworthiness of statement he cannot easily be surpassed.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings
“Most expositions of Aristotle's doctrines, when they have not been dictated by a spirit of virulent detraction, or unsympathetic indifference, have carefully suppressed all, or nearly all, the absurdities, and only retained what seemed plausible and consistent. But in this procedure their historical significance disappears.”
Source: Aristotle: a chapter from the history of science including analyses of Aristotle's scientific writings