The Wealth of Nations by Part 2 Chapter 4 Page 11

There arises in consequence a competition between different capitals, the owner of one endeavouring to get possession of that employment which is occupied by another. But upon most occasions he can hope to jostle that other out of this employment by no other means but by dealing upon more reasonable terms.

He must not only sell what he deals in somewhat cheaper, but in order to get it to sell, he must sometimes, too, buy it dearer. The demand for productive labour, by the increase of the funds which are destined for maintaining it, grows every day greater and greater. Labourers easily find employment, but the owners of capitals find it difficult to get labourers to employ. Their competition raises the wages of labour and sinks the profits of stock. But when the profits which can be made by the use of a capital are in this