Frases de Roger Bacon

Opus Majus, c. 1267
Fuente: Robert Belle Burke (2002) The Opus Majus of Roger Bacon Part 2. p. 583

Bk. 1, ch. 4. Translated by Robert B. Burke, in: Edward Grant (1974) Source Book in Medieval Science. Harvard University Press. p. 93
Opus Majus, c. 1267

Cited in: LIFE, 8 sept 1958, p. 73
Variant translation: Half of science is asking the right questions.

cited in: Morris Kline (1969) Mathematics and the physical world. p. 1
Opus Majus, c. 1267

Cited in: Opus majus: A translation by Robert Belle Burke. Vol 1 (1962). p. 128
Opus Majus, c. 1267
Contexto: For the things of this world cannot be made known without a knowledge of mathematics. For this is an assured fact in regard to celestial things, since two important sciences of mathematics treat of them, namely theoretical astrology and practical astrology. The first … gives us definite information as to the number of the heavens and of the stars, whose size can be comprehended by means of instruments, and the shapes of all and their magnitudes and distances from the earth, and the thicknesses and number, and greatness and smallness, … It likewise treats of the size and shape of the habitable earth … All this information is secured by means of instruments suitable for these purposes, and by tables and by canons.. For everything works through innate forces shown by lines, angles and figures.

Fuente: Opus Tertium, c. 1267, Ch. 14 as quoted in J. H. Bridges, The 'Opus Majus' of Roger Bacon (1900) Vol.1 http://books.google.com/books?id=6F0XAQAAMAAJ Preface pp.x-xi
Contexto: All these foregoing sciences are, properly speaking, speculative. There is indeed in every science a practical side, as Avicenna teaches in the first book of his Art of Medicine. Nevertheless, of Moral Philosophy alone can it be said that it is in the special and autonomatic sense practical, dealing as it does with human conduct with reference to virtue and vice, beatitude and misery. All other sciences are called speculative: they are not concerned with the deeds of the present or future life affecting man's salvation or damnation. All procedures of art and of nature are directed to these moral actions, and exist on account of them. They are of no account except in that they help forward right action. Thus practical and operative sciences, as experimental alchemy and the rest, are regarded as speculative in reference to the operations with which moral or political science is concerned. This science is the mistress of every department of philosophy. It employs and controls them for the advantage of states and kingdoms. It directs the choice of men who are to study in sciences and arts for the common good. It orders all members of the state or kingdom so that none shall remain without his proper work.

Compendium Studii Theologiae (1292) c. viii. & Brewer's Bacon http://books.google.com/books?id=xugSScQC_bEC (1859) p. 466 as cited by George Gresley Perry, The Life and Times of Robert Grosseteste, Bishop of Lincoln (1871)
Contexto: Oh how delightful is the taste of wisdom to those who are thus steeped in it from its very fount and origin. They who have not tried this cannot feel the delight of wisdom, just as a sick man cannot estimate the flavour of food. But because they are affected with this sort of mental sickness, and their intellect in this matter is as it were deaf from their very birth, so as not to appreciate the delight of harmony, on this account they grieve not at this so great loss of wisdom, though indeed without doubt it is an infinite loss.

OQHI, 65 http://www.mlat.uzh.ch/MLS/text.php?tabelle=Rogerus_Baco_cps4&rumpfid=Rogerus_Baco_cps4,%20Opus%20tertium,%20%2020&corpus=4&lang=0&current_title=Opus%20tertium&links=&inframe=1 as cited in: Jeremiah Hackett (2009) """" Roger Bacon http://plato.stanford.edu/archives/win2012/entries/roger-bacon"""" in: The Stanford Encyclopedia of Philosophy. Edward N. Zalta (ed.)
Opus Tertium, c. 1267
Contexto: I have labored much in sciences and languages, and I have up to now devoted forty years [to them] after I first learned the Alphabetum; and I was always studious. Apart from two of these forty years I was always [engaged] in study [or at a place of study], and I had many expenses just as others commonly have. Nevertheless, provided I had first composed a compendium, I am certain that within quarter or half a year I could directly teach a solicitous and confident person whatever I know of these sciences and languages. And it is known that no one worked in so many sciences and languages as I did, nor so much as I did. Indeed, when I was living in the other state of life [as a Magister], people marveled that I survived the abundance of my work. And still, I was just as involved in studies afterwards, as I had been before. But I did not work all that much, since in the pursuit of Wisdom this was not required.

OQHI, 65 http://www.mlat.uzh.ch/MLS/text.php?tabelle=Rogerus_Baco_cps4&rumpfid=Rogerus_Baco_cps4,%20Opus%20tertium,%20%2020&corpus=4&lang=0&current_title=Opus%20tertium&links=&inframe=1 as cited in: Jeremiah Hackett (2009) """" Roger Bacon http://plato.stanford.edu/archives/win2012/entries/roger-bacon"""" in: The Stanford Encyclopedia of Philosophy. Edward N. Zalta (ed.)
Opus Tertium, c. 1267
Contexto: I have labored much in sciences and languages, and I have up to now devoted forty years [to them] after I first learned the Alphabetum; and I was always studious. Apart from two of these forty years I was always [engaged] in study [or at a place of study], and I had many expenses just as others commonly have. Nevertheless, provided I had first composed a compendium, I am certain that within quarter or half a year I could directly teach a solicitous and confident person whatever I know of these sciences and languages. And it is known that no one worked in so many sciences and languages as I did, nor so much as I did. Indeed, when I was living in the other state of life [as a Magister], people marveled that I survived the abundance of my work. And still, I was just as involved in studies afterwards, as I had been before. But I did not work all that much, since in the pursuit of Wisdom this was not required.

OQHI, 43 http://www.mlat.uzh.ch/MLS/text.php?tabelle=Rogerus_Baco_cps4&rumpfid=Rogerus_Baco_cps4,%20Opus%20tertium,%20%2013&level=3&corpus=4&lang=0&current_title=Opus%20tertium&links=&inframe=1&hide_apparatus= as cited in: James J. Walsch (1911) """"Science at the Medieval Universities"""" in: Popular Science, May 1911, p. 449 http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_78.djvu/459
Opus Tertium, c. 1267
Contexto: The strongest argument proves nothing so long as the conclusions are not verified by experience. Experimental science is the queen of sciences, and the goal of all speculation.

Fuente: The Opus Majus of Roger Bacon - Volume 1

6th part Experimental Science, Ch.2 Tr. Richard McKeon, Selections from Medieval Philosophers Vol.2 Roger Bacon to William of Ockham
Opus Majus, c. 1267

v. i. iii. 3, ed. Bridges as quoted in A.C. Crombie, Robert Grossetest and the Origins of Experimental Science 1100-1700 (1953)
Opus Majus, c. 1267

Ch 13 ed. J. S. Brewer Opera quadam hactenus inedita (1859) p. 46
Opus Tertium, c. 1267

Cited by Peter Nicholls (1979) The Encyclopedia of science fiction: an illustrated A to Z. p. 376

Cited in: Carol A. Dingle (2000) Memorable Quotations: Philosophers of Western Civilization. p. 21

Cited in: John H. Woodburn, Ellsworth Scott Obourn (1965) Teaching the pursuit of science. p. 70

Bridges assumes that Bacon refers here to Peter Peregrinus of Maricourt.
Fuente: Opus Tertium, c. 1267, Ch. 13 as quoted in J. H. Bridges, The 'Opus Majus' of Roger Bacon (1900) Vol.1 http://books.google.com/books?id=6F0XAQAAMAAJ Preface p.xxv

6th part Experimental Science, Ch.2 Tr. Richard McKeon, Selections from Medieval Philosophers Vol.2 Roger Bacon to William of Ockham
Opus Majus, c. 1267