Whenever I have found that I have blundered, or that my work has been imperfected, and when I have been contemptuously criticised, and even when I have been overpraised, so that I have felt mortified, it has been my greatest comfort to say hundreds of times to myself that 'I have worked as hard as I could, and no man can do more than this.'

Everything in nature is the result of fixed laws.

Great is the power of steady misrepresentation; but the history of science shows that fortunately this power does not long endure.

Light will be thrown on the origin of man and his history.

Man is developed from an ovule, about 125th of an inch in diameter, which differs in no respect from the ovules of other animals.

In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.

Great is the power of steady misrepresentation