Thirdly, if understood in this way, the formula, capital — interest (profit), land — rent, labour — wages, presents a uniform and symmetrical incongruity. In fact, since wage-labour does not appear as a socially determined form of labour, but rather all labour appears by its nature as wage-labour (thus appearing to those in the grip of capitalist production relations), the definite specific social forms assumed by the material conditions of labour — the produced means of production and the land — with respect to wage-labour (just as they, in turn, conversely presuppose wage-labour), directly coincide with the material existence of these conditions of labour or with the form possessed by them generally in the actual labour-process, independent of its concrete historically determined social form, or indeed independent of any social form. The changed form of the conditions of labour, i. e., alienated from labour and confronting it independently, whereby the produced means of production are thus transformed into capital, and the land into monopolised land, or landed property — this form belonging to a definite historical period thereby coincides with the existence and function of the produced means of production and of the land in the process of production in general. These means of production are in themselves capital by nature; capital is merely an "economic appellation" for these means of production; and so, in itself land is by nature the earth monopolised by a certain number of landowners. Just as products confront the producer as an independent force in capital and capitalists — who actually are but the personification of capital — so land becomes personified in the landlord and likewise gets on its hind legs to demand, as an independent force, its share of the product created with its help. Thus, not the land receives its due portion of the product for the restoration and improvement of its productivity, but instead the landlord takes a share of this product to chaffer away or squander. It is clear that capital presupposes labour as wage-labour. But it is just as clear that if labour as wage-labour is taken as the point of departure, so that the identity of labour in general with wage-labour appears to be self-evident, then capital and monopolised land must also appear as the natural form of the conditions of labour in relation to labour in general. To be capital, then, appears as the natural form of the means of labour and thereby as the purely real character arising from their function in the labour-process in general. Capital and produced means of production thus become identical terms. Similarly, land and land monopolised through private ownership become identical. The means of labour as such, which are by nature capital, thus become the source of profit, much as the land as such becomes the source of rent.