无用即是有用

In the same way， in our studywe think the useless things might some day become something of value.When we meet with difficulties and are in need of guidance，the pebbles become diamonds.So， gather all the pebbles you canand you can have a future filled with diamonds.

  What we have learned will be used one day, so please believe that all your efforts will not be in vain and all your investment will be rewarded.  It is useless, actually it is of great use to enrich our experience.  At ordinary times, we often do some trivial things in our study and life, and we all think that they are useless, but we do not think that these trivial things are very useful for our future life, just like pebbles, although they look useless, they also have their value.