Susumu-sama
This is Kawaguchi Hidetoshi. This is a humble answer to the question.
“Jealousy” is one type of affliction, and it's really troublesome.
http://ja.wikipedia.org/wiki/嫉
As for jealousy and distress, I have dealt with them slightly in the following questions until now.
Question “I want to get rid of the feeling of jealousy. I want to make it lighter.”
http://hasunoha.jp/questions/134
Question “What are people's worries”
http://hasunoha.jp/questions/82
Question “What is the ugliest thing in the world”
http://hasunoha.jp/questions/66
I think I'll explain it this time from a slightly different point of view from the content of the humble answer above.
In Buddhism, there is the word “joy of joy.”
As the letter suggests, “joy accompanies,” but it is about arousing a heart of joy about other people's good deeds, mercy, and altruism, and following their merits.
Speaking of “Suiki Kudoku,” the Lotus Suki Sutra's “Suiki Kudohin 18” is famous, but it is essential in Buddhism that good deeds, mercy, and altruism performed to save those who are lost or suffering are truly appreciated and precious, and it is essential in Buddhism to cause me to prepare myself so that I can do it well eventually.
In most cases, jealousy occurs due to worldly desires, but even in worldly matters, if you want to succeed in the same way, I know that it is desirable to refrain as much as possible, rejoice together if possible, and work hard to adjust yourself because you want to succeed in the same way.
I am aware that if possible, aiming for success not “for myself,” but “for people, for society and the world,” will naturally lead to self-improvement. It is called “self-interest, etc.,” but in Buddhism, it is becoming more important to further aim for good virtue, mercy, and altruism “for all those who are lost or suffer.”
It's quite difficult to get rid of worries such as jealousy, but by all means, let's work hard together.
Kawaguchi Hidetoshi Gassho