The struggle for existence holds as much in the intellectual as in the physical world. A theory is a species of thinking and its right to exist is coextensive with its power of resisting extinction by its rivals.

It is the true office of history to represent the events themselves together with the counsels and to leave the observations and conclusions thereupon to the liberty and faculty of every man's judgment

It means people who are in high and responsible positions if they go against righteousness righteousness itself will get transformed into a destroyer.

It is easy to give advice from a port of safety.

Our body is a machine for living. It is organized for that it is its nature. Let life go on in it unhindered and let it defend itself.