SimchaMinute by Rabbi Avigdor Miller
Learn to be satisfied with what you have, and to rejoice in what Hashem gave you. Even if other people have better homes or have better cars.
Only be jealous of good things. Be jealous if he stands a longer Shemone Esrei. Be jealous of him. if he learns more be jealous of him. if he’s a bigger tzadik. Be jealous of him. but don’t be jealous of other things. — Ten Commandments of Derech Eretz 2 (#E-004)