GEN1520 Gratitude is rooted in remembrance.  Therefore we must make a conscious effort to recall how others have helped us; if we don’t do this, we will forget.  … Perhaps the [cup bearer] initially intended to help Joseph, but … because [he] did not actively cultivate a remembrance of the favor Joseph had done him he gradually forgot about him.  Ecclesiastes 9:14-5 also relates a story illustrating the cruelty of ingratitude: “There was a little city and few men in it, and to it came a great king, who surrounded it, and built mighty siege works against it.   Present in the city was a poor wise man who saved the city with his wisdom, but nobody remembered that poor man.   TELVOL1:97