This law that a man shall live by his labour is a two-edged law. If a man produce what the community needs, he should himself profit by the production; but, on the other hand, if a man will not work, neither should he eat. Only the man who produces what other men need, only the man who by his industry or capability contributes to the good of the community, has any right to profits. Quick and easy manipulations of money, shrewd and risky dexterities which yield no real benefit to the community, deserve no remuneration. It is a blind, sordid, and contemptible spirit that hastes to be rich by one or two successful transactions that profit no one. A man should be content to live on what he is worth to the community. Here also our minds are often confused by the complexities of business; but on that account it is all the more necessary that we firmly adhere to the few essential canons, such as that "trading ceases to be just when it ceases to benefit both parties," or that a man's wealth should truly represent his value to society. Conscience enlightened by allegiance to the Spirit of Christ is a much more satisfactory guide for the individual in trade, speculation, and investment than any trade customs or economic theories. 3. A third ground on which Paul rests his claim to be supported by the Church is ordinary gratitude: "If we have sown unto you spiritual things, is it a great thing if we shall reap your carnal things?" Some of the Churches founded by Paul spontaneously acknowledged this claim, and wished to free him from the necessity of labouring for his own support. They felt that the benefit they had derived from him could not be stated in terms of money; but prompted by irrepressible gratitude, they could not but seek to relieve him from manual labour and set him free for higher work. This method of gauging the amount of spiritual benefit absorbed, by its overflow in material aid given to the propagation of the Gospel would, I daresay, scarcely be relished by that monstrous development the niggardly Christian. 4. Lastly, Paul argues from the Levitical usage to the Christian. Both in heathen countries and among the Jews it was customary that they who ministered in holy things should live by the offerings of the people to the temple. Levites and priests alike had been thus maintained among the Jews. "Even so hath the Lord ordained that they which preach the Gospel should live of the Gospel." Were there no recorded command of the Lord to this effect, we might suppose Paul merely argued that this was the Lord's will; but among the original instructions given to the seventy who were first sent to preach the kingdom of heaven, we find this: "Into whatsoever house ye enter, there remain, eating and drinking such things as they give, for the labourer is worthy of his hire."