It’s when you’ve decided to invest on your own that you ought to try going it alone. That means ignoring the hot tips, the recommendations from brokerage houses, and the latest “can’t miss” suggestion from your favorite newsletter — in favor of your own research. It means ignoring the stocks that you hear Peter Lynch, or some similar authority, is buying.

The combination of new equipment and new chemicals turned the American farm into the most efficient food bank on earth, capable of producing more wheat, corn, and so forth, per acre than any other country's farms in the history of agriculture.

If my favorite Internet company sells for $30 a share, and yours sells for $10, then people who focus on price would say that mine is the superior company. This is a dangerous delusion. What Mr. Market pays for a stock today or next week doesn’t tell you which company has the best chance to succeed two to three years down the information superhighway.

In college, except for the obligatory courses, I avoided science, math, and accounting — all the normal preparations for business. I was on the arts side of school, and along with the usual history, psychology, and political science, I also studied metaphysics, epistemology, logic, religion, and the philosophy of the ancient Greeks. As I look back on it now, it’s obvious that studying history and philosophy was much better preparation for the stock market than, say, studying statistics. Investing in stocks is an art, not a science, and people who’ve been trained to rigidly quantify everything have a big disadvantage

Actually Wall Street thinks just as the Greeks did. The early Greeks used to sit around for days and debate how many teeth a horse has. They thought they could figure it out by just sitting there, instead of checking the horse. A lot of investors sit around and debate whether a stock is going up, as if the financial muse will give them the answer, instead of checking the company.

This is a crucial safeguard of our capitalist system, because if shareholders could be sued whenever a company made a mistake, people like you and me would be afraid to buy shares and become investors. Why would we want to run the risk of being held responsible for another big oil spill, or a rat hair in a hamburger, or the endless variety of mishaps that occur in business every day? Without limited liability, nobody would want to buy a single share of stock.