Cato in his earlier days, being a poor man, and always employed in service in the field, never complained of any thing that he ate, and thought it most disgraceful to quarrel with his servant for not having pleased his palate. Subsequently, however, as he became richer, he used to invite his friends and colleagues to dinner, and after the repast was wont to punish with the scourge those servants who had made mistakes or cooked the food badly. He always endeavoured to establish some quarrel amongst his slaves, so that they might plot against one another, instead of combining against himself; and when any of them appeared to have committed any crime deserving to be punished by death, the offender was formally tried, and if found guilty, was put to death in the presence of all his fellow-servants. As Cato grew more eager to make money, he declared that farming was more an amusement than a source of income, and preferred investing his money in remunerative undertakings, such as marshes that required draining, hot springs, establishments for washing and cleaning clothes, land which would produce an income by pasturage or by the sale of wood, and the like, which afforded him a considerable revenue, and one which, as he said, not Jupiter himself could injure, meaning that he was not dependent upon the weather for his income, as farmers are. He also used to deal in marine assurance, which is thought to be a most dangerous form of investment, which he managed in the following manner. For the sake of security he made those who wished to borrow money form themselves into an association of fifty persons, representing as many ships, and held one share in the undertaking himself, which was managed by his freedman Quintio, who himself used to sail in the ships of the association and transact their mercantile business. He used to lend money to his slaves, if they desired it. They used with the money to buy young slaves, teach them a trade at Cato's expense for a year, and then dispose of them. Many of these Cato retained in his own service, paying the price offered by the highest bidder, and deducting from it the original cost of the slave. When endeavouring to encourage his son to act in a similar manner, he used to say that it was not the part of a man, but of a lone woman, to diminish one's capital; and once, with an excessive exaggeration, he said that the most glorious and godlike man was he who on his death was found to have earned more than he inherited.