It is not the germs we need worry about. It is our inner terrain.

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

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

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.

Do not promote what you can't explain, simplify, and prove early.

Luck favors the mind that is prepared.

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.