The possession of a perfect knowledge of your business is an absolute necessity in order to insure success. - P. T. Barnum

And in what business is there not humbug? “There’s cheating in all trades but ours,” is the prompt reply from the boot-maker with his brown paper soles, the grocer with his floury sugar and chicoried coffee, the butcher with his mysterious sausages and queer veal, the dry goods man with his “damaged goods wet at the great fire” and his “selling at a ruinous loss,” the stock-broker with his brazen assurance that your company is bankrupt and your stock not worth a cent (if he wants to buy it,) the horse jockey with his black arts and spavined brutes, the milkman with his tin aquaria, the land agent with his nice new maps and beautiful descriptions of distant scenery, the newspaper man with his “immense circulation,” the publisher with his “Great American Novel,” the city auctioneer with his “Pictures by the Old Masters” — all and every one protest each his own innocence, and warn you against the deceits of the rest. My inexperienced friend, take it for granted that they all tell the truth — about each other! and then transact your business to the best of your ability on your own judgment.

"Young men starting in life should avoid running into debt. There is scarcely anything that drags a person down like debt. It is a slavish position to get ill, yet we find many a young man, hardly out of his "teens," running in debt. He meets a chum and says, "Look at this: I have got trusted for a new suit of clothes." He seems to look upon the clothes as so much given to him; well, it frequently is so, but, if he succeeds in paying and then gets trusted again, he is adopting a habit which will keep him in poverty through life. Debt robs a man of his self-respect, and makes him almost despise himself."

The plan of "counting the chickens before they are hatched" is an error of ancient date, but it does not seem to improve by age.