-Shakespeare
An indignant person will feel pain only when he sees that others have undeserved prosperity. Jealous people go beyond this limit, and it will be painful to see anyone's prosperity.
-Aristotle
Everyone's vanity is equal to his stupidity.
-Montaigne
Vanity is a desire to pursue personal glory. It is not by people's quality, grades and achievements, but by the existence of individuals to win the appreciation, respect and admiration of others. So vanity is equal to a frivolous and beautiful woman at best.
-Goethe
Talent is often more dangerous than no talent; It is impossible not to be despised, but it is even harder not to be the object of jealousy.
-Napoleon