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.

It is questionable if all the mechanical inventions yet made have lightened the day's toil of any human being.

The best state for human nature is that in which, while no one is poor, no one desires to be richer, nor has any reason to fear from thrust back, by the efforts of others to push themselves forward.

The ne plus ultra of wickedness ... is embodied in what is commonly presented to mankind as the creed of Christianity.

It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied. And if the fool, or the pig, are of a different opinion, it is because they only know their own side of the question.

Trade is a social act. Whoever undertakes to sell any description of any goods to the public, does what affects the interest of other persons, and of society in general; and thus his conduct, in principal, comes within the jurisdiction of society.

If the earth must lose that great portion of its pleasantness which it owes to things that the unlimited increase of wealth and population would extirpate from it, for the mere purpose of enabling it to support a larger, but not a happier or a better population, I sincerely hope, for the sake of posterity, that they will be content to be stationary, long before necessity compels them to it.