What are the ramifications of "B'ris Kehunas Olam"?
Rashi: Pinchas was granted a permanent lease of Kehunah for himself and his offspring.
Targum Yonasan: 'Because they denigrated him by calling him the son of Puti the Midyanite, 1 I will bestow upon him the Kehunah Gedolah, and because he took the spear with his arm, struck the Midyanite women in her womb and Davened with his mouth on behalf of the people of Yisrael, the Kohanim will receive the three gifts- the right foreleg, the jaws and the stomach.
How come that Pinchas ben Elazar was not already a Kohen?
Rashi: Because he was already born when Aharon and his sons were chosen to become Kohanim, and it was only their subsequent offspring who continued the line of Kehunah.
What is the meaning of "asher Kinei l'Elokav"?
Rashi: It means 'because he was zealous on behalf of 1 his G-d'.
What is the connection between Pinchas' zealousness on behalf of his G-d and the B'ris Shalom that he received as a reward?
Seforno: Because, since Bil'am quarreled Hashem's quarrel, Hashem saved him from the quarrel of competing forces. 1
Targum Yonasan: Refer to 25:13:2:2.
And what is the significance of the statement "Vayechaper al B'nei Yisrael"?
Seforno: And because he atoned for Yisrael, by killing the adulterers in public in order that the people should receive atonement by not objecting to his actions, he received the Kehunah, granting him a mandate to atone for the people.