Top 90 Louis Pasteur Quotes (2025 Update)
Page 2 of 2

51. “Science belongs to no one country.”

— Louis Pasteur

52. “Science knows no country, because knowledge belongs to humanity.”

— Louis Pasteur

53. “Outsidetheir laboratories, thephysicianand chemist are soldiers without arms on the field of battle.”

— Louis Pasteur

54. “What did you do today to receive your instruction?”

— Louis Pasteur

55. “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

56. “The controls of life are structured as forms and nuclear arrangements, in a relation with the motions of the universe.”

— Louis Pasteur

57. “Science proceeds by successive answers to questions more and more subtle, coming nearer and nearer to the very essence of phenomena.”

— Louis Pasteur

58. “Worship the spirit of criticism. If reduced to itself it is not an awakener of ideas or a stimulant to great things, but, without it, everything is fallible; it always has the last word.”

— Louis Pasteur

59. “After death, life reappears in a different form and with different laws. It is inscribed in the laws of the permanence of life on the surface of the earth and everything that has been a plant and an animal will be destroyed and transformed into a gaseous, volatile and mineral substance.”

— Louis Pasteur

60. “Posterity will one day laugh at the foolishness of modern materialistic philosophers.”

— Louis Pasteur

61. “As in the experimental sciences, truth cannot be distinguished from error as long as firm principles have not been established through the rigorous observation of facts.”

— Louis Pasteur

62. “Happy is he who bears a god within.”

— Louis Pasteur

63. “These are the living springs of great thoughts and great actions. Everything grows clear in the reflections from the Infinite.”

— Louis Pasteur

64. “I give them experiments and they respond with speeches.”

— Louis Pasteur

65. “Where are the real sources of human dignity, freedom and modern democracy, if not in the concept of infinity to which all men are equal?”

— Louis Pasteur

66. “The grandeur of the acts of men are measured by the inspiration from which they spring.”

— Louis Pasteur

67. “The greatest disorder of the mind is to let will direct it.”

— Louis Pasteur

68. “There is a time in every man’s life when he looks to his God, when he looks at his life, when he wonders how he will be remembered.”

— Louis Pasteur

69. “Nothing is lost and nothing is created in the operations of art as those of nature.”

— Louis Pasteur

70. “The more I study nature, the more I stand amazed at the work of the Creator.”

— Louis Pasteur

71. “To bring one’s self to believe in a truth that has just dawned upon one is the first step towards progress; to persuade others is the second.”

— Louis Pasteur

72. “You bring me the deepest joy that can be felt by a man whose invincible belief is that Science and Peace will triumph over Ignorance and War, that nations will unite, not to destroy, but to build, and that the future will belong to those who will have done most for suffering humanity.”

— Louis Pasteur

73. “I have the faith of a Breton peasant and by the time I die I hope to have the faith of a Breton peasant’s wife.”

— Louis Pasteur

74. “Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of inventions.”

— Louis Pasteur

75. “Never will the doctrine of spontaneous generation recover from the mortal blow struck by this simple experiment.”

— Louis Pasteur

76. “Time is the best appraiser of scientific work, and I am aware that an industrial discovery rarely produces all its fruit in the hands of its first inventor.”

— Louis Pasteur

77. “Could I but know all, I would have the faith of a Breton peasant woman.”

— Louis Pasteur

78. “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?”

— Louis Pasteur

79. “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.”

— Louis Pasteur

80. “Since the most ancient times, all men, and particularly those who endeavored in the practice of medicine, have brought closer together two natural phenomena of capital importance: illness or fever and fermentation.”

— Louis Pasteur

81. “In good philosophy, the word cause ought to be reserved to the single Divine impulse that has formed the universe.”

— Louis Pasteur

82. “Blessed is he who carries within himself a God, an ideal, and obeys it.”

— Louis Pasteur

83. “If you suppress laboratories, physical science will be stricken with barrenness and death.”

— Louis Pasteur

84. “There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.”

— Louis Pasteur

85. “One must not assume that an understanding of science is present in those who borrow the language.”

— Louis Pasteur

86. “God grant that by my persevering labours I may bring a little stone to the frail and ill-assured edifice of our knowledge of those deep mysteries of Life and Death where all our intellects have so lamentably failed.”

— Louis Pasteur

87. “You have not succeeded in your experiments, that is all there is to it.”

— Louis Pasteur

88. “Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.”

— Louis Pasteur

89. “The greatest malfunction of spirit is to believe things.”

— Louis Pasteur

90. “The artificial products do not have any molecular dissymmetry; and I could not indicate the existence of a more profound separation between the products born under the influence of life and all the others.”

— Louis Pasteur

91. “When one works and imagines and dreams of nothing else than the search for answers that God has posed, it is difficult to be so still.”

— Louis Pasteur

92. “I am utterly convinced that Science and Peace will triumph over Ignorance and War, that nations will eventually unite not to destroy but to edify, and that the future will belong to those who have done the most for the sake of suffering humanity.”

— Louis Pasteur

93. “Happy is he who bears a god within, and who obeys it. The grandeur of human actions is measured by the inspiration from which they spring.”

— Louis Pasteur

94. “The Ancients understood the omnipotence of the underside of things.”

— Louis Pasteur

95. “Our only consolation, as we feel our strength failing us, is to feel that we may help those who come after us to do more and to do better than ourselves.”

— Louis Pasteur