I would rather live with the woman I love in a world full of trouble, than to live in heaven with nobody but men.

At thirty most men have prejudices rather than opinions-that is to say, rather than judgments-and few men have lived to be sixty without materially modifying the opinions they held at thirty.

If the world ever advances beyond what it is today, it must be led by men who express their real opinions.

Who can over estimate the progress of the world if all the money wasted in superstition could be used to enlighten, elevate and civilize mankind?

If the account given in Genesis is really true, ought we not, after all, to thank this serpent? He was the first schoolmaster, the first advocate of learning, the first enemy of ignorance, the first to whisper in human ears the sacred word liberty, the creator of ambition, the author of modesty, of inquiry, of doubt, of investigation, of progress and of civilization.

Every child should be taught that useful work is worship and that intelligent labor is the highest form of prayer.

He who dishonors himself [by lying about his opinions] for the sake of being honored by others will find that two mistakes have been made - one by himself, and the other, by the people.