» The only antidote to mental suffering is physical pain.
» The history of all hitherto existing society is the history of class struggles.
» Landlords, like all other men, love to reap where they never sowed.
» Colonial system, public debts, heavy taxes, protection, commercial wars, etc., these offshoots of the period of manufacture swell to gigantic proportions during the period of infancy of large-scale industry. The birth of the latter is celebrated by a vast, Hero-like slaughter of the innocents.
» On a level plain, simple mounds look like hills; and the insipid flatness of our present bourgeoisie is to be measured by the altitude of its ''great intellects.''
» I am greatly pleased with the public, authentic isolation in which we two, you and I, now find ourselves. It is wholly in accord with our attitude and our principles.
» From the outset, the Christian was the theorizing Jew, the Jew is therefore the practical Christian, and the practical Christian has become a Jew again.
» Machines were, it may be said, the weapon employed by the capitalists to quell the revolt of specialized labor.
» Medicine heals doubts as well as diseases.
» It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves.