Warren Buffett's annual letter to shareholders (PDF) of Berkshire Hathaway was published this weekend. It's always a great read and a fascinating look at one of the world's most successful companies. More importantly it gives some insight into how the company thinks and how the leadership views the larger financial world.

Here are some of my favorite lines:

Berkshire will forever remain a financial fortress. In managing, I will make expensive mistakes of commission and will also miss many opportunities, some of which should have been obvious to me. At times, our stock will tumble as investors flee from equities. But I will never risk getting caught short of cash.

On debt (emphasis mine):

We use debt sparingly. Many managers, it should be noted, will disagree with this policy, arguing that significant debt juices the returns for equity owners. And these more venturesome CEOs will be right most of the time.

At rare and unpredictable intervals, however, credit vanishes and debt becomes financially fatal. A Russian- roulette equation – usually win, occasionally die – may make financial sense for someone who gets a piece of a company's upside but does not share in its downside. But that strategy would be madness for Berkshire. Rational people don't risk what they have and need for what they don't have and don't need.

Sounds like some great personal advice as well.

On long-term optimism and belief in the American economy and prosperity:

Our country's almost unbelievable prosperity has been gained in a bipartisan manner. Since 1942, we have had seven Republican presidents and seven Democrats. In the years they served, the country contended at various times with a long period of viral inflation, a 21% prime rate, several controversial and costly wars, the resignation of a president, a pervasive collapse in home values, a paralyzing financial panic and a host of other problems. All engendered scary headlines; all are now history.

There are also many other countries around the world that have bright futures. About that, we should rejoice: Americans will be both more prosperous and safer if all nations thrive. At Berkshire, we hope to invest significant sums across borders.

All of the annual letters starting from 1977 are available online as well.