It would seem to me that I was committing a theft if I were to let one day go by without doing some work. Louis Pasteur More Quotes by Louis Pasteur More Quotes From Louis Pasteur Herrmann Pidoux and Armand Trousseau stated 'Disease exists within us, because of us, and through us', Pasteur did not entirely disagree, 'This is true for certain diseases', he wrote cautiously, only to add immediately: 'I do not think that it is true for all of them'. Louis Pasteur truth science thinking In the realm of scientific observation, luck is granted only to those who are prepared. Louis Pasteur observation granted luck One must not assume that an understanding of science is present in those who borrow the language Louis Pasteur assuming language understanding Nothing is lost and nothing is created in the operations of art as those of nature. Louis Pasteur nature science art Fortune favors the prepared mind. Louis Pasteur In the field of observation, chance favors only the prepared minds. Louis Pasteur In the fields of observation chance favors only the prepared mind. Louis Pasteur There does not exist a category of science to which one can give the name applied science. There are science and the applications of science, bound together as the fruit of the tree which bears it. Louis Pasteur One must work; one must work. I have done what I could. Louis Pasteur could must done work