We cannot doubt that self-interest is the mainspring of human nature. It must be clearly understood that this word is used here to designate a universal, incontestable fact, resulting from the nature of man, and not an adverse judgment, as would be the word selfishness.

Justice is achieved only when injustice is absent.

[To learn] is to harness Nature; to spare man all that is most physical, backbreaking, and brutish in the work of production; to make mind master over matter.

Try to imagine a system of labor imposed by force that is not a violation of liberty; a transfer of wealth imposed by force that is not a violation of property rights. If you cannot do so, then you must agree that the law cannot organize labor and industry without organizing injustice.

If goods don't cross borders, armies will.

Ah, you miserable creatures! You who think that you are so great! You who judge humanity to be so small! You who wish to reform everything! Why don't you reform yourselves? That task would be sufficient enough.

There is not a tool, an implement, or a machine that has not resulted in a decrease in the contribution of human labor. Labor is not made permanently idle [though]; when replaced in one special category... it turns its attack against other obstacles on the main road to progress.