If you want your business to survive for 100 years, you've got to make it through every single day for 100 years. It's not enough to do it 99.9% of the time.
Warren Buffett[The U.S. Treasury] can borrow basically unlimited amounts. They can stay there for years and years. These assets will be worth more money over time. So when Merrill Lynch sells a bunch of mortgage-related assets at 22 cents on the dollar like they did a month or so ago, the buyer goes - is going to make money, and he's going to make a lot more money if it happens to be an institution like the U.S. government which has very, very cheap borrowing costs.
Warren Buffett