Korach

‎Korach, driven by his own jealousy, stirs the passions of his group into a frenzy of righteous indignation. He claims that Moshe fabricated commandments & misappropriated power. Therefore, Korach & his two hundred & fifty followers challenged Moshe by protesting Aaron’s appointment as the Kohen Gadol. 

The Posuk then states, ואהרן מה הוא כי תלינו עליו, and as for Aaron, what is he that you incite protest against him?
This is seemingly an odd question. After all, Aaron is the one who was appointed as Kohen Gadol; who else would they protest against?

Reb Meir Arik answers based on a gemara in Eruvin which uses three similar sounding words to teach us that a person's true character comes out in three situations, בכוסו, בכיסו, ובכעסו : one’s cup, how a person acts while drunk; with one’s pocket, how one relates to money; & lastly his anger, how one behaves when he loses control. 

Now, as far as Aaron was concerned, he couldn't be tested by his cup, for kohanim weren't allowed to become intoxicated; he couldn't be judged by his money for, in the midbar, they were all equal living off the maan. The only way to judge his character was by his anger. 

This is what the phrasing of the pasuk presents, ואהרן מה הוא, and Aaron, what is he - if you want to see what Aaron is all about, כי תלינו עליו, when you protest against him, testing him to see if he'll get angry, you’ll see that he doesn’t. You will then see and recognize how holy  he is. The question then is, how are you fighting against him?

This Mida of not getting angry is so powerful that when Reb Eliahu Lapian was asked why he merited long life, he said that it's because as long as he can remember, he never got angry at anyone or anything. 

There's a story told about רב צדקה חוצין, who was asked to do a bris on Shabbos in a town far from his home. Before Shabbos, he brought over the knife & all the equipment that he needed. Shabbos morning he walked for over two hours to that town to do the bris. However, when he finally got there, he was told that someone else had come & done the bris alrea‎dy! 

Imagine how we would have felt walking two hours for nothing, just to turn around & walk back. However, he said nothing and exhibited no anger, no resentment, nothing. We should take this lesson so that when things don't go exactly like we would want them or someone does something to upset us, we don’t let it get to us. 
We should emulate the ways of Aaron, who realized that the people who were fighting with him were really fighting with Hashem whose command he was following. It had nothing to do with him, so why should it bother him.  

If we, too, would realize that anything that happens to us, whether seemingly by accident or even at the hands of another person, is really Hashem’s doing.  Then we, too, will understand that nothing will be gained by getting angry. If we could take this lesson to heart, we will all be happier & the world will be a better place!