The most important investment you can make is in yourself. Very few people get anything like their potential horsepower translated into the actual horsepower of their output in life. Potential exceeds realization for many people...The best asset is your own self. You can become to an enormous degree the person you want to be.

You have to be able to communicate in life and probably schools underemphasize that. If you can't talk to people or write, you're giving up your potential.

The much-maligned idle rich have received a bad rap: They have maintained their wealth while many There is scarcely an instance of a man who has made a fortune by speculation and kept it. Andrew Carnegie of the energetic rich, aggressive real estate operators, corporate acquirers, oil drillers, etc. have their fortunes disappear.

You get in a lot of trouble when you start putting fictitious numbers.

Wide diversification is only required when investors do not understand what they are doing.

In that, we agreed with Andrew Carnegie, who said that huge fortunes that flow in large part from society should in large part be returned to society. In my case, the ability to allocate capital would have had little utility unless I lived in a rich, populous country in which enormous quantities of marketable securities were traded and were sometimes ridiculously mispriced. And fortunately for me, that describes the U.S. in the second half of the last century.

... the best way to own common stocks is through an index fund.