After failing miserably in his attempt to curse the Jews, Bilam seeks to drive them to spiritual self-destruction. Their G-d does not tolerate immorality, he says to Balak. Therefore, entice them to act promiscuously. A Midianite woman succeeds in ensnaring Zimri, prince of the tribe of Shimon , into sinning in public, a catastrophe which demands an immediate, drastic response. Pinchas answers the call, and with spear in hand, kills the two. As a reward for his actions, Hashem blesses him with a covenant of peace and eternal priesthood. (Torah Treasury)
In describing Pinchas, the posuk tells us פינחס בן אלעזר בן אהרן הכהן, Pinchas the son of Elazar, son of Aaron the Kohen. Rashhi explains that the reason the Torah had to trace him back to Aaron was because the people were humiliating him by saying, did you see this son of Puti whose mother’s father fattened calves for idolatry? Yet he killed a prince of a tribe of Israel!? Therefore, the Torah came & traces his ancestry to Aaron.
The Bais Av says that this doesn't make sense. The people saw first hand that Hashem was angry at the people & that twenty-four thousand people died in a plague. As soon as Pinchas acted, the plague stopped. As well, even what they were saying about him was in no way a contradiction to what he did, so why were they humiliating him?
Reb Yonasan Eibschutz explains, really everyone agreed that what Pinchas did was correct. However, in order to placate their consciences that they stood by without acting, they said to themselves, “if one of us that's from a respected lineage would get up and avenge Hashem's honor, it wouldn't be that great a kiddush Hashem. However, when a lowly person goes against a prince to avenge Hashem's honor, that's a much greater kiddush Hashem & that was their intent. He was from the lowly people & yet he did this, so a greater kiddush Hashem came out.
The posuk tells us that he wasn't lowly at all. Rather, he came from Aaron. Also, they were making a mistake for anyone can avenge Hashem’s honor; all of these calculations were just excuses for not doing the right thing.
This teaches us that all the excuses we come up with for not doing the right thing, whether the excuse is: that I'm too good to help that person, it's beneath me; or I'm not good enough, for who am I to do such noble things? It’s all just an excuse. We have to realize that any one of us can do anything! I saw a story from Rabbi Yechiel Spero that exemplifies this point, how a simple man could do great things. This demonstrates that all of us can do whatever we put our minds to.
When Laibel was already an old man, he told this story that happened when he was a soldier in the Russian army. As Yom Kippur approached, he knew he was not going to get off from work, for only those that were incapacitated would be excused. Desperate to free himself from work on the holiest day of the year, he came up with a plan.
Two days before Yom Kippur, he took a brick & smashed it into his mouth breaking his tooth. He bled profusely & his gums became swollen. He went to the medic who sent him to the dentist, who, with one look, knew that he would have to extract the tooth. Using no pain killers, the dentist just sat him down & tugged on the tooth until it came out. Laibel screamed in agony & nearly passed out from the pain. But when the dentist instructed him to rest for a few days he knew that it was all worth it. He did not have to work & was able to fast the entire day .
Rav Chaim Kluft shared this story & added that after the elderly man told him this story, he smiled & revealed four gaps in his teeth , one for each year he was in the army!