A four-year-old will ask why eleven times in a row, and the eleventh question is usually better than the first, and by then the adult has run out of answers and says because that is how it is. The child accepts this, not because it satisfies them but because they have learned something more useful: that there is a point beyond which questioning is not welcome, and that the point arrives well before the answers do.
That lesson takes. By adolescence most people have stopped at question two. By forty they no longer ask the first one, and would describe themselves, quite sincerely, as curious.
How it is trained out
Nobody forbids it. It is discouraged by a thousand small signals, none of which is memorable on its own.
A question at the wrong moment produces impatience, and children read impatience precisely. A question in a classroom slows the class down. A question in a family reveals something the family does not discuss, and the temperature drops for a second, and you notice. And later, in working life, the reward structure completes the job: an answer is a contribution, and a question is a delay, and after fifteen years of that, the reflex has fully reversed.
By the end you are not suppressing questions. That would at least leave a trace. They simply no longer form, which is a much more efficient arrangement and entirely invisible from the inside.
What survives instead
You would object, reasonably, that you ask questions constantly. You do, and it is worth being exact about which kind.
You ask operational questions: how much, by when, what happens if, who is responsible. These are excellent questions and your success rests on them. They all share a feature, which is that they take the frame as given and enquire within it.
The other kind steps outside the frame. Why is this what we are doing at all. Who decided this was worth wanting. What is this for. These are not more difficult intellectually; a child manages them easily. They are more expensive, because a satisfactory answer can require the dismantling of something you have already built.
You did not stop asking because you found the answers. You stopped because the answers stopped being affordable.
The efficiency of an unexamined life
It should be said that the arrangement works. This is not a story about people being duped.
Someone who accepts the frame moves faster. They do not stall on foundational doubt; they execute. Almost everyone who does conspicuously well in any field has this quality, and it is not stupidity but a kind of useful narrowing, and you have it, and it has served you.
The cost only appears at the far end, when there is nothing left to execute and the frame itself finally comes into view. And then you discover that a set of assumptions absorbed before you were twenty has been quietly directing a life of considerable resources for four decades, and has never once been asked to justify itself, and would probably struggle to.
Why questioning yourself is harder still
Applying this inward is a different order of difficulty, and there are two reasons.
The first is that the thing being questioned is also the thing asking. There is no neutral position and no external instrument, and every question you put to yourself is answered by the same apparatus that formed the assumption in the first place, which will produce something fluent and reassuring within seconds.
The second is that certain internal questions come with a physical resistance attached. You will have noticed it: an actual reluctance, a subject change, a sudden urgent memory of something that needs doing. That resistance is not laziness and it is not coincidence. It is reliable enough to be used as a map. The questions that produce it are, almost without exception, the ones worth staying with.
What a real question feels like
It is worth distinguishing, because most of what passes for self-questioning is not.
Rumination has the form of a question and the function of a loop: it returns the same material repeatedly and reaches nothing, and it can run for years. A real question is uncomfortable in a different way. It opens rather than circles. It produces silence rather than more sentences. And you can usually tell you have found one because you do not want to continue, and there is nowhere obvious to go, and the honest response is that you do not know.
Not knowing, held without hurrying to fill it, is the actual condition in which anything gets seen. It is also the condition your entire education and career trained you to escape as quickly as possible.
Where to leave it
There is nothing to interrogate tonight and no list of prompts that would survive the week.
Only, perhaps, one thing to try on something ordinary. Take a rule you live by, something small and domestic that you have never examined, and ask why. Then ask why again of whatever answer arrives. Then a third time. Somewhere around the third or fourth you will hit either a genuine value, which is worth knowing you hold, or a sentence in somebody else's voice that has been running your Tuesdays since 1974.
Both outcomes are useful. And you will notice, doing it, that the machinery still works perfectly, that the four-year-old is entirely intact in there, and that nothing was ever lost except permission.