T 3.2.6.11

Upon the whole, then, we are to consider this distinction betwixt justice and injustice, as having two different foundations, viz. that of interestself-interest, when men observe, that 'tis impossible to live in society without restraining themselves by certain rules; and that of morality, when this interest is once observ'd,observ'd to be common to all mankind, and men receive a pleasure from the view of such actions as tend to the peace of society, and an uneasiness from such as are contrary to it. 'Tis the voluntary convention and artifice of men, which makes the first interest take place; and therefore those laws of justice are so far to be consider'd as artificial. After that interest is once establish'd and acknowledg'd, the sense of morality in the observance of these rules follows naturally, and of itself; tho' 'tis certain, that it is also augmented by a new artifice, and that the public instructions |of politicians, and the private education of parents, contribute to the giving us a sense of honour and duty in the strict regulation of our actions with regard to the properties of others.