Leverage is the only way a smart person can go broke. You do smart things, you eventually get very rich. If you do smart things and use leverage and one bad thing happens—it all goes to zero.

The best protection against the future is a present worth protecting. Most managers spend their careers preparing for contingencies that never arrive while neglecting the compounding damage of small, daily decisions they consider beneath their attention.

The sign of a truly great business is one where the management can point to having made several decisions that were obviously wrong at the time — and survived them. Durability is not about being right; it's about being able to be wrong without dying.

The best time to buy a house is always five years ago. The best time to start a company is always five years ago. The best time to invest is always five years ago. Waiting for certainty is just a sophisticated way of opting out.

The best business returns are usually achieved by companies that are doing something that it's hard or impossible for you to do to them. Every year they get harder and harder to compete with. They have an ever-widening moat around their castle, and the key is not 'how big is the castle today?' but 'what is the trajectory of the moat?'

Most investors think risk-taking is the path to wealth. It isn't. Wealth is built by surviving long enough for compounding to work — and surviving means avoiding the risks that can knock you out of the game permanently. The goal isn't maximum return; it's maximum duration.

The biggest mistake investors make is to believe that what happened in the recent past is likely to persist. They assume that something that was a good investment in the recent past is still a good investment. Typically, high past returns simply mean that an asset has become more expensive and is a poorer, not better, investment.

The greatest competitive advantage in business is not being smarter than your competitors. It's being willing to be patient when they can't afford to be. A long time horizon is a cheat code that almost no one is willing to use.

Leverage is the only way a smart person can go broke. It's also the only way a person of modest means can become wealthy quickly — which is why it's so seductive and so dangerous. The solution is simple but not easy: never let a temporary setback become a permanent one.

You only have to be right a few times in your life, as long as you don't make too many big mistakes in between. The asymmetry between gains and losses means that avoiding catastrophe is more important than scoring victories.

The chains of habit are too light to be felt until they are too heavy to be broken — but there is a second half to that observation that people miss: the same compounding force that imprisons you can liberate you, if you choose the habit deliberately.

The most important question to ask on the job is not 'What am I getting?' but 'What am I becoming?' Wages and salaries are poor measures of the value of your time. The real return on your work is the set of skills, habits, and judgment you accumulate — because those compound, and your paycheck doesn't.

The stock market is a device for transferring money from the impatient to the patient. But what most people miss is that patience isn't a passive act — it requires the active suppression of the urge to feel busy.

We are spinning our own fates, good or evil, and never to be undone. Every smallest stroke of virtue or of vice leaves its little scar. The drunken Rip Van Winkle, in Jefferson's play, excuses himself for every fresh dereliction by saying, 'I won't count this time!' Well, he may not count it, and a kind Heaven may not count it; but it is being counted none the less.

The market is a voting machine in the short run and a weighing machine in the long run — but what most people miss is that the weighing takes far longer than anyone expects, which is precisely why so few investors ever collect the reward for being right.

The trick is to make your mistakes non-fatal. You don't need to be right all the time. You just need to survive long enough to be right eventually.

The investor's chief problem — and even his worst enemy — is likely to be himself. In the short run, the market is a voting machine, but in the long run, it is a weighing machine. The man who cannot master his emotions is ill-suited to profit from the investment process.

Most people overestimate what they can do in one year and underestimate what they can do in ten years. But the rarer error — the one that actually destroys wealth — is mistaking a temporary edge for a permanent one and pressing it long past its expiration date.

A great business at a fair price is superior to a fair business at a great price. But what most people miss is the third lesson: the passage of time is the friend of the wonderful business and the enemy of the mediocre one. Patience isn't just a virtue in investing — it's a compounding force.

Most people think diversification means owning many things. But the real diversification that matters is diversification across time — being able to survive long enough that the math works in your favor. Staying power is the asset most investors forget to buy.

The chains of habit are too light to be felt until they are too heavy to be broken. Spend each day trying to be a little wiser than you were when you woke up. Discharge your duties faithfully and well. Step by step you get ahead, but not necessarily in fast spurts.

The biggest returns in investing come not from picking the right answer, but from surviving long enough to be right. Time is the only factor that can't be faked, borrowed, or optimized away.

The key to investing is not assessing how much an industry is going to affect society, or how much it will grow, but rather determining the competitive advantage of any given company and, above all, the durability of that advantage. The products or services that have wide, sustainable moats around them are the ones that deliver rewards to investors.

The stock market is a device for transferring money from the impatient to the patient. But what most people miss is that patience itself is a skill — and like all skills, it atrophies without deliberate practice against the grain of every instinct you have.

Occasionally, the market does something so stupid it takes your breath away. The trick is to make sure you're there to take advantage of it — and that requires doing almost nothing most of the time, which is psychologically brutal for people who feel they're paid to act.

The best single question to ask about any moat is: 'In ten years, will this business be harder or easier to compete with?' Most analysts ask about next quarter's margins. That's why most analysts are wrong about compounding.

Most people overestimate what they can do in one year and underestimate what they can do in ten years. Compounding is not just a financial concept — it applies to knowledge, relationships, and reputation. The problem is that compounding looks like nothing is happening, right up until it looks like everything is happening.

The chains of habit are too light to be felt until they are too heavy to be broken. But there is a second, less-discussed corollary: institutions that survive longest are those that deliberately audit their habits before those habits calcify into dogma. Most companies wait until the weight becomes a crisis.

Forgetting that your returns depend on the returns of the businesses you own—not on what you paid for them—is the source of more investment error than almost any other mistake I can think of. You must always ask: what will this business earn over time? Everything else is noise.

The stock market is a device for transferring money from the impatient to the patient. But patience itself is not a strategy — you must also be right about what you're waiting for.

The chains of habit are too light to be felt until they are too heavy to be broken. Most investors underestimate how much their early portfolio habits — the things they barely notice doing — compound into the architecture of their entire financial life.

Most people think of risk as the probability of losing money. But the real risk is that you'll be forced to sell at the wrong time — that circumstances, not judgment, will determine your outcome. Volatility is only dangerous if it can compel you to act.

The best investment you can make is in businesses you understand, and the second-best is in your own ability to understand more businesses. Most investors do neither — they buy what's rising and call it research.

Most people overestimate what they can do in one year and underestimate what they can do in ten years. But the subtler error is assuming the next ten years will look like the last ten — the truly dangerous assumption for any investor or builder.

Leverage is the difference between outcomes in a world that looks similar on the surface. Two investors can have the same insight, the same conviction, and the same patience — but the one who sized correctly will retire while the other merely survives. Position sizing is not a detail; it is the strategy.

The chains of habit are too light to be felt until they are too heavy to be broken. A young person who consistently saves a small amount will find, decades later, that the habit has built a fortress; a young person who defers saving will find the habit of spending has built a prison.

The biggest mistake investors make is to believe that what happened in the recent past is likely to persist. They assume that something that was a good investment in the recent past is still a good investment. Typically, high past returns simply imply that an asset has become more expensive and is a less compelling investment.

The trick is to keep learning. If you stop learning, other people will pass you by. Temperament alone won't do it — you have to keep learning, because the world keeps changing, and you have to keep up with it and even get ahead of it.

The best business returns are usually achieved by companies that are doing something quite similar today to what they were doing five or ten years ago. That is no accident.

Most people overestimate what they can do in one year and underestimate what they can do in ten years. But the deeper error is that they plan in one-year chunks at all — the unit of compounding is decades, not quarters.

The difference between a good business and a bad business is that good businesses throw up one easy decision after another. The bad businesses throw up painful decisions time after time.