Numbers 16:1-18:32; 1 Samuel 11:14-12:22; John 19:1-17 (Acts 7:44-53 )
There are two rebellions this week. First, Korach, a Levite, was passed over for the leadership of his tribe and then challenges Moshe over the position of High Priest. No good rebellion can be "sold" as a means for personal gain, so Korach convinces 250 men of renown that they must stand up for a matter of principle -- that each and every one of them has the right to the office of High Priest (which Moshe had announced that God had already designated his brother, Aharon, to serve).
Fascinatingly, all 250 followers of Korach accept Moshe's challenge to bring an offering of incense to see who God will choose to fill the one position. This meant that every man figured he would be the one out of 250 to not only be chosen, but to survive the ordeal. Moshe announces that if the earth splits and swallows up the rebels it is a sign that he (Moshe) is acting on God's authority. And thus it happened!
The next day the entire Israelite community rises in a second rebellion and complains to Moshe, "You have killed God's people!" The Almighty brings a plague which kills 14,700 people and only stops when Aharon offers an incense offering.
To settle the question once and for all, Moshe has the head of each tribe bring a staff with his name on it. The next morning only Aharon's staff had blossomed and brought forth almonds. The people were shown this sign. Aharon's staff was placed in front of the curtain of the ark as testimony for all time.
“And Korach, the son of Izhar, the son of Kehas, the son of Levi, took …” (Num. 16:1).
Why does the Torah give us Korach's genealogy here?
Rashi explains that the key reason for Korach's rebellion against Moshe was his envy of a relative who received honor which Korach believed should have belonged to him.
Envy is destructive. It prevents a person from enjoying his own blessings. When you focus on the success of another person and feel pain because of it, you are likely to do things that are highly counterproductive. Envy is one of the three things that totally destroy a person (Pirke Avos 4:28). The downfall of Korach was because of this trait. Not only did he not get what he wanted, but he lost everything he already possessed.
How does one overcome envy? The key is to focus on what you have and on what you can accomplish in this world. Envy arises when a person looks at others and compares himself to them. The ultimate that anyone can have in this world is happiness. When you master this trait by focusing on those things conducive to happiness, you need never to envy another person.