And therefore, the idea that directions can be given for the gaining of wealth, irrespectively of the consideration of its moral sources, or that any general and technical law of purchase and gain can be set down for national practice, is perhaps the most insolently futile of all that ever beguiled men through their vices. So far as I know, there is not in history record of anything so disgraceful to the human intellect as the modern idea that the commercial text, "Buy in the cheapest market and sell in the dearest," represents, or under any circumstances could represent, an available principle of national economy. Buy in the cheapest market?--yes; but what made your market cheap? Charcoal may be cheap among your roof timbers after a fire, and bricks may be cheap in your streets after an earthquake; but fire and earthquake may not therefore be national benefits. Sell in the dearest?--yes, truly; but what made your market dear? You sold your bread well to-day; was it to a dying man who gave his last coin for it, and will never need bread more, or to a rich man who to-morrow will buy your farm over your head; or to a soldier on his way to pillage the bank in which you have put your fortune? None of these things you can know. One thing only you can know, namely, whether this dealing of yours is a just and faithful one, which is all you need concern yourself about respecting it; sure thus to have done your own part in bringing about ultimately in the world a state of things which will not issue in pillage or in death. And thus every question concerning these things merges itself ultimately in the great question of justice, which, the ground being thus far cleared for it, I will enter upon in the next paper, leaving only, in this, three final points for the reader's consideration. It has been shown that the chief value and virtue of money consists in its having power over human beings; that, without this power, large material possessions are useless, and, to any person possessing such power, comparatively unnecessary. But power over human beings is attainable by other means than by money. As I said a few pages back, the money power is always imperfect and doubtful; there are many things which cannot be reached with it, others which cannot be retained by it. Many joys may be given to men which cannot be bought for gold, and many fidelities found in them which cannot be rewarded with it. Trite enough,--the reader thinks. Yes: but it is not so trite,--I wish it were,--that in this moral power, quite inscrutable and immeasurable though it be, there is a monetary value just as real as that represented by more ponderous currencies. A man's hand may be full of invisible gold, and the wave of it, or the grasp, shall do more than another's with a shower of bullion. This invisible gold, also, does not necessarily diminish in spending. Political economists will do well some day to take heed of it, though they cannot take measure.