How a person's understanding of value grows
Some judgments show how much you understand only after you have used them in your own life. A single choice of apartment shows how experience fills in the costs you left out.
A saying often attributed to Charlie Munger circulates online: "There are no true value investors before the age of forty." The original source of this quotation has yet to be verified, but it raises a question worth exploring: What does a person have to experience to develop a genuine understanding of value? (Chinese-language example)
I take "forty" as a reminder rather than a hard rule: some judgments only reveal how much we truly understand them after we have put them to use in our own lives. We may learn early on that time is precious, health matters, and reliability is a virtue. Yet we may still have little sense of how much weight to give these things when making concrete decisions.
Renting an apartment can bring this difference into focus. Imagine someone just starting their career, choosing between two apartments. One costs 1,000 yuan less per month but adds two hours to the daily commute. The other is more expensive but close to the office. After doing the math, the person sees that the cheaper apartment will save 12,000 yuan a year and chooses it. In the calculations they make at the time, the money saved is the easiest benefit to see.
Once they move in, however, the time spent commuting begins to acquire a concrete cost. They want to cook a proper meal, but by the time they get home, it is too late. They want to learn something new, but after a shower, all they want to do is lie down. On weekends, they still need to catch up on the sleep they missed during the week. Those two hours, which once existed only as a distance on a map, have become time each day in which nothing else can be planned.
Experience supplies the costs their first judgment left out. At first, they were comparing two rental prices. Only later did they realize that every day, they were paying the difference in time and energy. The words "time is precious" finally came to represent a tangible loss.
When renting again, they will make a more complete calculation: How much energy will remain after the commute? How much hardship can the money saved actually relieve? Will paying more rent put pressure on their daily life? They may choose to move closer, or they may continue living farther away. The decision itself need not change, but now they understand what they are exchanging for what.
Each person's understanding of value grows out of these different circumstances. Someone who urgently needs to save money may be willing to put up with a long commute. Someone who must care for family in the evenings may place greater value on getting home on time. The same two hours represent different opportunities and responsibilities to different people. When someone makes a choice different from yours, it may simply be because they are bearing costs you do not have to bear.
At first, it is easy to adopt ready-made standards. A high salary means a good job; knowing many people means having a broad network; a packed schedule means a productive day. These standards are convenient, but they often leave out one basic question: What must you give up to obtain these things, and is the exchange worth it to you?
Life gradually brings the omitted factors into view. If a high-paying job consistently eats into your rest and time with loved ones, its value needs to be reassessed. If a friend reliably follows through on every promise, "dependable" becomes more than a compliment. It becomes a reason to entrust that person with things that matter. Value begins to shape concrete trade-offs.
Judgments about investments must also stand up to reality, but the value of a business has its own operational foundations. No matter how much you like a company, you still need to examine whether it can earn money consistently, whether it can turn its earnings into cash, and whether its purchase price is reasonable. Experience shows you risks you missed before, but personal feelings cannot substitute for these fundamentals. What life decisions and investment judgments have in common is that you must bear the consequences of your own understanding.
Experience can also breed prejudice. You move closer to work, encounter a terrible landlord, and conclude that cheap apartments are the only reliable option. You lose money on an investment and decide that every opportunity is a scam. A person can go through the same kind of experience many times and still do nothing more than repeat the same interpretation. For experience to become sound judgment, you must also distinguish between the parts of an outcome caused by your own choices and those attributable to chance.
Forty, then, can only be a figure of speech. Young people can uncover flaws in their judgment early through reading, observation, and small-scale experiments. Older people may spend their entire lives refusing to revise their answers. We do not have to personally experience every wrong turn, but we do need to understand seriously how other people's experiences differ from, and resemble, our own circumstances.
Developing your own sense of value can begin with a concrete review of a past decision: What did you want at the time? What did you actually pay? Which costs did you fail to account for? How will you adjust your approach next time? An experience begins to become understanding only when it can change a future choice.
With such a standard of value, when everyone around you praises an opportunity, you have a basis for deciding whether to accept it. You know what it can bring you, and you know what it will take away. Others can tell you how good an opportunity is, but in the end, the final reckoning must be settled against the reality of your own life.