My present and most fixed opinion regarding the nature of alcoholic fermentation is this: The chemical act of fermentation is essentially a phenomenon correlative with a vital act, beginning and ending with the latter. I believe that there is never any alcoholic fermentation without their being simultaneously the organization, development, multiplication of the globules, or the pursued, continued life of globules which are already formed.

There are two men in each one of us: the scientist, he who starts with a clear field and desires to rise to the knowledge of Nature through observations, experimentation and reasoning, and the man of sentiment, the man of belief, the man who mourns his dead children, and who cannot, alas, prove that he will see them again, but who believes that he will, and lives in the hope – the man who will not die like a vibrio, but who feels that the force that is within him cannot die.

Little science takes you away from God but more of it takes you to Him.

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.

If science has no country, the scientist should have one, and ascribe to it the influence which his works may have in this world.

Change only favours minds that are diligently looking and preparing for discovery.

My strength lies solely in my tenacity.