She avoids instructing her daughter. Instead she asks a question that makes Ming work out the hard fact herself, and then tells four stories that let the warning arrive as evidence rather than as a lecture.
1. The question that does the work of a lecture. “Do you know that to reach world-class standard in any field, one has to be singularly and intensively pursuing the subject for at least ten years?”
Written as a statement — You will have to work for ten years — this is a discouragement, and a teenager would resist it. Written as a question beginning “Do you know…?”, it becomes information offered, and Ming has to do the sum for herself: ten years from fifteen means twenty-five. The reader arrives at the discouraging part unaided, which is the only way she will believe it.
2. The four anecdotes, and what each is for.
3. Why the order of the anecdotes matters. The two dark ones are placed in the middle, between “By all means follow that dream” at the start and “I wish at least one of your dreams comes true too” at the end. The bad news is surrounded by permission and blessing, so it can never be mistaken for refusal — and she says so outright: “No, I am not going to put a wet blanket on your dreams.”
The single most effective choice in the letter. The last anecdote is about herself, and it is an anecdote of a dream that changed — “This was not the dream I had in my youth.” By ending with her own unfinished, altered, ten-year project rather than with a success story, she gives up the authority of the parent who has already arrived. She is not standing at the finish line telling Ming how to run; she is on the road herself. That is what makes “I wish at least one of your dreams comes true too” land as solidarity rather than as instruction.