What little recognition the idea of obligation to the public obtains in modern morality, is derived from Greek and Roman sources, not from Christian; as, even in the morality of private life, whatever exists of magnanimity, high-mindeness, personal dignity, even the sense of honour, is derived from the purely human, not the religious part of our education, and never could have grown out of a standard of ethics in which the only worth, professedly recognized, is that of obedience.

The general tendency of things throughout the world is to render mediocrity the ascendant power among mankind.

Truth emerges from the clash of adverse ideas.

Despotism is a legitimate mode of government in dealing with barbarians, provided the end be their improvement.

On religion in particular the time appears to me to have come when it is the duty of all who, being qualified in point of knowledge, have on mature consideration satisfied themselves that the current opinions are not only false but hurtful, to make their dissent known.

So Long as we do not harm others we should be free to think, speak, act, & live as we see fit, without molestation from individuals, law, or gov't.

The ends of scientific classification are best answered, when the objects are formed into groups respecting which a greater number of general propositions can be made, and those propositions more important, than could be made respecting any other groups into which the same things could be distributed. ... A classification thus formed is properly scientific or philosophical, and is commonly called a Natural, in contradistinction to a Technical or Artificial, classification or arrangement.