The gains and losses of one thing always seem to haunt us and will always be the fountain of trouble in life. If we can really put it aside, trouble will really be detached. In fact, the real proposition worth worrying about is: what form should the value of life be transformed? For this eternal mystery, a thousand people have a thousand answers, but none of the most authoritative textbooks in the world can provide the most perfect answer.
Which of the following does the above paragraph mainly explain?
Most people's troubles come from the gains and losses of one thing at a time.