In the case of the farmer and the labourer, their interests are always the same, and it is absolutely impossible that their free contracts can be onerous to either party. It is the interest of the farmer, that his work should be done with effect and celerity: and that cannot be, unless the labourer is well fed, and otherwise found with such necessaries of animal life, according to his habitudes, as may keep the body in full force, and the mind gay and cheerful. For of all the instruments of his trade, the labour of man (what the ancient writers have called the instrumentum vocale) is that on which he is most to rely for the repayment of his capital. The other two, the semivocale in the ancient classification, that is, the working stock of cattle, and the instrumentum mutum, such as carts, ploughs, spades, and so forth, though not all inconsiderable in themselves, are very much inferior in utility or in expense; or, without a given portion of the first, are nothing at all. For, in all things whatever, the mind is the most valuable and the most important; and in this scale the whole of agriculture is in a natural and just order; the beast is as an informing principle to the plough and cart; the labourer is as reason to the beast; and the farmer is as a thinking and presiding principle to the labourer. An attempt to break this chain of subordination in any part is equally absurd; but the absurdity is the most mischievous in practical operation, where it is the most easy, that is, where it is the most subject to an erroneous judgment. It is plainly more the farmer's interest that his men should thrive, than that his horses should be well fed, sleek, plump, and fit for use, or than that his waggons and ploughs should be strong, in good repair, and fit for service. On the other hand, if the farmer cease to profit of the labourer, and that his capital is not continually manured and fructified, it is impossible that he should continue that abundant nutriment, and clothing, and lodging, proper for the protection of the instruments he employs. It is therefore the first and fundamental interest of the labourer, that the farmer should have a full incoming profit on the product of his labour. The proposition is self-evident, and nothing but the malignity, perverseness, and ill-governed passions of mankind, and particularly the envy they bear to each other's prosperity, could prevent their seeing and acknowledging it, with thankfulness to the benign and wise Disposer of all things, who obliges men, whether they will or not, in pursuing their own selfish interests, to connect the general good with their own individual success.