Did you ever observe to whom the accidents happen? Chance favors only the prepared mind.

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.

The greatest derangement of the mind is to believe in something because one wishes it to be so.

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.

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

What did you do today to receive your instruction?

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'.