Money then being established as the necessary medium of exchange, another species of money-getting soon took place, namely, by buying and selling, at probably first in a simple manner, afterwards with more skill and experience, where and how the greatest profits might be made. For which reason the art of money-getting seems to be chiefly conversant about trade, and the business of it to be able to tell where the greatest profits can be made, being the means of procuring abundance of wealth and possessions: and thus wealth is very often supposed to consist in the quantity of money which any one possesses, as this is the medium by which all trade is conducted and a fortune made, others again regard it as of no value, as being of none by nature, but arbitrarily made so by compact; so that if those who use it should alter their sentiments, it would be worth nothing, as being of no service for any necessary purpose. Besides, he who abounds in money often wants necessary food; and it is impossible to say that any person is in good circumstances when with all his possessions he may perish with hunger. Like Midas in the fable, who from his insatiable wish had everything he touched turned into gold. For which reason others endeavour to procure other riches and other property, and rightly, for there are other riches and property in nature; and these are the proper objects of economy: while trade only procures money, not by all means, but by the exchange of it, and for that purpose it is this which it is chiefly employed about, for money is the first principle and the end of trade; nor are there any bounds to be set to what is thereby acquired. Thus also there are no limits to the art of medicine, with respect to the health which it attempts to procure; the same also is true of all other arts; no line can be drawn to terminate their bounds, the several professors of them being desirous to extend them as far as possible. (But still the means to be employed for that purpose are limited; and these are the limits beyond which the art cannot proceed.) Thus in the art of acquiring riches there are no limits, for the object of that is money and possessions; but economy has a boundary, though this has not: for acquiring riches is not the business of that, for which reason it should seem that some boundary should be set to riches, though we see the contrary to this is what is practised; for all those who get riches add to their money without end; the cause of which is the near connection of these two arts with each other, which sometimes occasions the one to change employments with the other, as getting of money is their common object: for economy requires the possession of wealth, but not on its own account but with another view, to purchase things necessary therewith; but the other procures it merely to increase it: so that some persons are confirmed in their belief, that this is the proper object