How has a failure, or apparent failure, set you up for later success? Do you have a favourite failure?

It was a brilliant idea: You have no responsibility to live up to what other people think you ought to accomplish.  I have no responsibility to be like they expect me to be.

My first mistake, of course, was in buying control of Berkshire. Though I knew its business - textile manufacturing - to be unpromising, I was enticed to buy because the price looked cheap. Stock purchases of that kind had proved reasonably rewarding in my early years, though by the time Berkshire came along in 1965 I was becoming aware that the strategy was not ideal. If you buy a stock at a sufficiently low price, there will usually be some hiccup in the fortunes of the business that gives you a chance to unload at a decent profit, even though the long-term performance of the business may be terrible. I call this the "cigar butt" approach to investing. A cigar butt found on the street that has only one puff left in it may not offer much of a smoke, but the "bargain purchase" will make that puff all profit. Unless you are a liquidator, that kind of approach to buying businesses is foolish.

A period of transition to a new quality in all spheres of society's life is accompanied by painful phenomena. When we were initiating perestroika we failed to properly assess and foresee everything. Our society turned out to be hard to move off the ground, not ready for major changes which affect people's vital interests and make them leave behind everything to which they had become accustomed over many years. In the beginning we imprudently generated great expectations, without taking into account the fact that it takes time for people to realize that all have to live and work differently, to stop expecting that new life would be given from above.

I was prepared to fail. I was prepared to not be able to get things accepted, because I saw that happen to my mother.

The Godfather was a very unappreciated movie when we were making it. They were very unhappy with it. They didn't like the cast. They didn't like the way I was shooting it. I was always on the verge of getting fired. So it was an extremely nightmarish experience. I had two little kids, and the third one was born during that. We lived in a little apartment, and I was basically frightened that they didn't like it. They had as much as said that, so when it was all over I wasn't at all confident that it was going to be successful, and that I'd ever get another job.

I got quite nice results in my one-question studies, but never wrote up any of the work, because I had set myself impossible standards: in order not to pollute the literature, I wanted to report only findings that I had replicated in detail at least once, and the replications were never quite perfect. I realized only gradually that my aspirations demanded more statistical power and therefore much larger samples than I was intuitively inclined to run. This observation also came in handy some time later.

I never thought that we would fail or that I would fail. I knew from time to time we may make some blunders. We may make some mistakes, but we were not going to fail.

Unfortunately, in the case of Iraq, I believe we could have done that through an inspection process. I was calling for a few months more to complete our work. We hadn’t seen indications of weapons of mass destruction. We hadn’t seen indications of nuclear weapons. ... Unfortunately, it didn’t work that way. There was faulty intelligence. There were lots of other considerations that made a decision to go to war tempting, to get rid of Saddam Hussein.

I will begin with the importance of learning from experience. It is less important, I believe, where you start. It is more important how and what you learn. If the quality of the learning is high, the development gradient is steep, and, given time, you can find yourself in a previously unattainable place. I believe the Infosys story is living proof of this. Learning from experience, however, can be complicated. It can be much more difficult to learn from success than from failure. If we fail, we think carefully about the precise cause. Success can indiscriminately reinforce all our prior actions.

So Cambridge rejected me. Quite rightly, although at the time I thought it was a little churlish. So, I had to do it without any university training. ... and I began to realize that there were probably a lot more of these things, and that if you find these things, you get a position in the ladder which you can’t get to unless you have either got an education or something else. So by finding important things, you immediately get into the game, which you’d been excluded from otherwise.

I wish I had learned more from failure than just mortification. I don’t think you learn much from success, and I don’t think you learn much from failure, unfortunately. It’s one of the sad things. You certainly learn that it’s more fun to have a hit than a flop.

At first the research did not seem to be particularly interesting – I carried out a systematic search for processes that might destroy the CFCs in the lower atmosphere, but nothing appeared to affect them. We knew, however, that they would eventually drift to sufficiently high altitudes to be destroyed by solar radiation. The question was not only what destroys them, but more importantly, what the consequences are.

Well yes, but like I said, small mistakes or small failures. We take small failures very often. We have failures in investment. We have failures in operation, but no big mistakes or big failures. How do we take that? Like ordinary business.

When you’re working and you make mistakes, particularly when you’re young, you make discoveries because you do things that are inappropriate and wrongheaded, but within the wrongheadedness you find an unexpected way to go. These things are truly the breakthroughs.

In fact, what I usually say to people, “Probably some of the most successful scientists are the ones that know how to deal with failure well.” Because it’s easy to feel good when you succeed. That’s an easy thing. But you’re probably going to fail in science a lot more than you succeed, so you really have to learn how to deal with it and not let it beat you.

But in 2007, the music stopped. We had lost sight of our shared purpose and our guiding principles, in which growth and success began to cover up mistakes and a disease set into Starbucks. That disease, hubris. We lost our way and believe it or not, we almost lost the entire company.

The Berlin Wall limited my opportunities. It quite literally stood in my way. However, there was one thing which this wall couldn't do through all those years: It couldn't impose limits on my inner thoughts, my personality, my imagination, my dreams and desires.

No. I mean if you fail 70 percent of the time, you had a great year. You're dealing with failure seven out of ten times as a hitter.

One setback after another, we shook it off and skated to the next opportunity. Each time, we gain skills and strengthen our character. No setback that comes our way doesn't look like an opportunity these days.