Louis Pasteur citáty
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Louis Pasteur bol francúzsky chemik, biológ a lekár. Zakladateľ mikrobiológie, lekárskej imunológie a stereochémie. Wikipedia  

✵ 27. december 1822 – 28. september 1895
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Louis Pasteur: Citáty v angličtine

“The greatness of human actions is measured by the inspiration that it brings. Blessed is he who carries within himself a God, an ideal of beauty and obeys it: an ideal of art, ideal of science, ideal of country, ideal virtues of the Gospel! These are the wellsprings of great thoughts and great actions. All reflections illuminate infinity.”

Variant translations:
Blessed is he who carries within himself a God, an ideal, and who obeys it: ideal of art, ideal of science, ideal of the gospel virtues, therein lie the springs of great thoughts and great actions; they all reflect light from the Infinite. (As quoted by Sir William Osler in his introduction to The Life of Pasteur (1907) by Rene Vallery-Radot, as translated by R .L. Devonshire (1923)
Blessed is he who carries within himself a god and an ideal and who obeys it — an ideal of art, of science, or gospel virtues. Therein lie the springs of great thoughts and great actions; they all reflect light from the Infinite. (As quoted in The Wordsworth Dictionary of Quotations (1998) by Connie Robertson, p. 320)
Discours de réception de Louis Pasteur (1882)
Originál: (fr) La grandeur des actions humaines se mesure à l’inspiration qui les fait naître. Heureux celui qui porte en soi un Dieu, un idéal de la beauté et qui lui obéit : idéal de l’art, idéal de la science, idéal de la patrie, idéal des vertus de l’Évangile! Ce sont là les sources vives des grandes pensées et des grandes actions. Toutes s’éclairent des reflets de l’infini.

“When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.”

The phrase in French is found in Étienne Blanchard (1941), "Recueil d'idées", p. 76: "Quand je m'approche d'un enfant, il m'inspire deux sentiments: la tendresse pour ce qu'il est, et le respect pour ce qu'il peut être un jour." It doesn't give any reference, just like modern books which include the quote in English.
Disputed

“I am on the edge of mysteries and the veil is getting thinner and thinner.”

Letter (December 1851); as quoted in The Great Influenza: The Epic Story of the Deadliest Plague In History (2004) by John M. Barry
Variant translations:
I am on the verge of mysteries and the veil is getting thinner and thinner. The nights seem to me too long... I am often scolded by Madame Pasteur, but I tell her I shall lead her to fame.
Microbe Hunters (1926) by Paul De Kruif
My plan of study is traced for this coming year... I am hoping to develop it shortly in the most successful manner... I think that I have already told you that I am on the verge of mysteries, and that the veil which covers them is getting thinner and thinner. The nights seem to me too long, yet I do not complain... I am often scolded by Mme. Pasteur, but I console her by telling her that I shall lead her to fame.
The Life of Pasteur (1916) by René Vallery-Radot

“In the fields of observation chance favours only the prepared mind.”

Dans les champs de l'observation le hasard ne favorise que les esprits préparés.
Lecture, University of Lille (7 December 1854)
Alternate translations of this or similar statements include:
Chance favors the prepared mind.
Fortune favors the prepared mind.
In the field of observation, chance favors the prepared mind.
Where observation is concerned, chance favors only the prepared mind.

“Religion has no more place in science than science has in religion.”

Answer from Pasteur to his disciple Elie Metchnikoff when was questioned whether his approach to spontaneous generation was bound to a religious ideal. According to Patrice Debré's Luis Pasteur, 2000 https://books.google.co.uk/books?id=RzOcl-FLw30C&lpg=PP1&pg=PA176#v=onepage&q&f=false,, p. 176.
Disputed

“Let me tell you the secret that has led me to my goal. My strength lies solely in my tenacity.”

As quoted in There's a Spiritual Solution to Every Problem (2001) by Wayne W. Dyer

“A little science estranges men from God, but much science leads them back to Him.”

This alleged quotation is attributed to Pasteur at least as early as 1952, in Miracles, by Morvan Lebesque. It appears in a letter about Pasteur reprinted in the February 7, 1920 issue of America magazine, but the author of the letter attributes the saying to Pascal and says it applies to Pasteur. It may be a paraphrase of Francis Bacon, in "On Atheism" in Essays (1597): A little Philosophy inclineth Mans Minde to Atheisme; But depth in Philosophy, bringeth Mens Mindes about to Religion.
Misattributed

“Now, gentlemen, there will be a beautiful story: what is the role, in the overall scheme of creation, of some of these little beings who are the agents of fermentation, the agents of putrefaction, of disorganization of everything that life has had in the surface of the globe. This role is immense, marvelous, really moving. Maybe one day maybe I will be given [the opportunity] to explain here some of these results. May God grant it to be still in the presence of such a brilliant assembly!”

Original in French: Maintenant, messieurs, il y aurait un beau sujet à traiter : c’est celui du rôle, dans l’économie générale de la création, de quelques-uns de ces petits êtres qui sont les agents de la fermentation, les agents de la putréfaction, de la désorganisation de tout ce qui a eu vie il la surface du globe. Ce rôle est immense, merveilleux, vraiment émouvant. Un jour peut-être me sera-t-il donné de vous exposer ici quelques-uns de ces résultats. Dieu veuille que ce soit encore en présence à une aussi brillante assemblée!
Soirées scientifiques de la Sorbonne (1864)

“The Greeks understood the mysterious power of the underside of things. They are the ones who gave us one of the most beautiful words in our language, the word enthusiasm.”

Εν Θεος - A God within.

Variant translation: "The Greeks have given us one of the most beautiful words of our language, the word "enthusiasm" Εν Θεος .— a God within. The grandeur of the acts of men are measured by the inspiration from which they spring. Happy is he who bears a God within." (As quoted in Spiritual Literacy : Reading the Sacred in Everyday Life (1998) by Frederic Brussat and Mary Ann Brussat)

Original: Les Grecs avaient compris la mystérieuse puissance de ce dessous de choses. Ce sont eux qui nous ont légué un des plus beaux mots de notre langue, le mot enthousiasme. —Εν Θεος. — Un Dieu intérieur.
Discours de réception de Louis Pasteur (1882)

“You say that, in the present state of science, it is wiser to have no opinion: well, I have an opinion, not a sentimental one, but a rational one, having acquired a right to it by twenty years of assiduous labour, and it would be wise in every impartial mind to share it. My opinion — nay more, my conviction — is that, in the present state of science, as you rightly say, spontaneous generation is a chimera ; and it would be impossible for you to contradict me, for my experiments all stand forth to prove that spontaneous generation is a chimera. What is then your judgment on my experiments? Have I not a hundred times placed organic matter in contact with pure air in the best conditions for it to produce life spontaneously? Have I not practised on these organic materia which are most favourable, according to all accounts, to the genesis of spontaneity, such as blood, urine, and grape juice? How is it that you do not see the essential difference between my opponents and myself? Not only have I contradicted, proof in hand, every one of their assertions, while they have never dared to seriously contradict one of mine, but, for them, every cause of error benefits their opinion. For me, affirming as I do that there are no spontaneous fermentations, I am bound to eliminate every cause of error, every perturbing influence, I can maintain my results only by means of most irreproachable experiments; their opinions, on the contrary, profit by every insufficient experiment and that is where they find their support.”

Zdroj: The Life of Pasteur (1902), p. 242; The first statement in bold in the above paragraph, as quoted from in Œuvres de Pasteur, Volume 7 (1939), Masson et cie, p. 539 reads:
Mon opinion, mieux encore, ma conviction, c'est que, dans l'état actuel de la science, comme vous dites avec raison, la génération spontanée est une chimère, et il vous serait impossible de me contredire, car mes expériences sont toutes debout, et toutes prouvent que la génération spontanée est une chimère

“Do you understand now the relationship between the question of spontaneous generation and the major problems that I listed in the beginning? But, gentlemen, in such a subject, rather than as poetry, pretty fancy and instinctive solutions, it is time for science, the true method resumes its duties and exercise. Here, it takes no religion, no philosophy, no atheism, no materialism, no spiritualism. I might even add: as a scholar, I do not mind. It is a matter of fact; I approached without a preconceived idea, too ready to declare, if the experiment had imposed upon me the confession, that there was a spontaneous generation, of which I am convinced today that those who assure it are blindfolded.”

Soirées scientifiques de la Sorbonne (1864)
Originál: (fr) Comprenez-vous maintenant le lien qui existe entre la question des générations spontanées et ces grands problèmes que j'ai énumérés en commençant? Mais, messieurs, dans un pareil sujet, assez de poésie comme cela, assez de fantaisie et de solutions instinctives; il est temps que la science, la vraie méthode reprenne ses droits et les exerce. Il n'y a ici ni religion, ni philosophie, ni athéisme, ni matérialisme, ni spiritualisme qui tienne. Je pourrais même ajouter : Comme savant, peu m'importe. C'est une question de fait; je l'ai abordée sans idée préconçue, aussi prêt à déclarer, si l'expérience m'en avait imposé l'aveu, qu'il existe des générations spontanées, que je suis persuadé aujourd'hui que ceux qui les affirment ont un bandeau sur les veux.

“I have been looking for spontaneous generation for twenty years without discovering it. No, I do not judge it impossible. But what allows you to make it the origin of life? You place matter before life and you decide that matter has existed for all eternity. How do you know that the incessant progress of science will not compel scientists to consider that life has existed during eternity, and not matter? You pass from matter to life because your intelligence of today cannot conceive things otherwise. How do you know that in ten thousand years, one will not consider it more likely that matter has emerged from life? You move from matter to life because your current intelligence, so limited compared to what will be the future intelligence of the naturalist, tells you that things cannot be understood otherwise. If you want to be among the scientific minds, what only counts is that you will have to get rid of a priori reasoning and ideas, and you will have to do necessary deductions not giving more confidence than we should to deductions from wild speculation.”

Originál: (fr) La génération spontanée, je la cherche sans la découvrir depuis vingt ans. Non, je ne la juge pas impossible. Mais quoi donc vous autorise à vouloir qu'elle ait été l'origine de la vie? Vous placez la matière avant la vie et vous faites la matière existante de toute éternité. Qui vous dit que, le progrès incessant de la science n'obligera pas les savants, qui vivront dans un siècle, dans mille ans, dans dix mille ans... à affirmer que la vie a été de toute éternité et non la matière.? Vous passez de la matière à la vie parce que votre intelligence actuelle, si bornée par rapport à ce que sera l'intelligence des naturalistes futurs, vous dit qu'elle ne peut comprendre autrement les choses. Qui m'assure que dans dix mille ans on ne considérera pas que c'est de la vie qu'on croira impossible de ne pas passer à la matière? Si vous voulez être au nombre des esprits scientifiques, s, qui seuls comptent, il faut vous débarrasser des idées et des raisonnements a priori et vous en tenir aux déductions nécessaires des faits établis et ne pas accorder plus de confiance qu'il ne faut aux déductions de pures hypothèses."

As quoted in Pasteur et la philosophie (2004), by Patrice Pinet, p. 63

Partially quoted in Louis Pasteur : Free Lance of Science (1950) by René Dubos, p 396

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