This sentence only applies to people with good personal structure, such as psychological preparation, the ability to find and seize opportunities, and the ability to adjust themselves.
In other words, only those who exercise with art can see its effect.
Maybe we will cite many examples of success and adversity. But I believe there will be more examples of failure in adversity, just because failure is forgotten.
Also, according to people's personality, generally speaking, optimists exercise better in adversity, while introverts and pessimists grow up in prosperity in an orderly way.