What are the implications of "v'Samu Es Sh'mi"?
Rashi (from Sifri): It implies that the Kohanim should bless Yisrael with the Shem ha'Meforash. 1
Moshav Zekeinim citing Yerushalmi (Gitin 5:9): Do not say 'a Kohen who transgresses Arayos and murder 2 blesses me?!' I (Hashem) bless you, and not him!
Refer to 6:23:1:1**, 6:27:151:1-3.
Moshav Zekeinim citing R. Simchah: Even though a Kohen who murdered may not Duchan (Brachos 32b), if he repented, he may.
What are the implications of "va'Ani Avarachem"?
Rashi #1, Targum Onkelos and Targum Yonasan: It implies that Hashem will bless Yisrael. 1
Rashi #2: It implies that (when the Kohanim bless Yisrael) Hashem will bless the Kohanim.
QUESTIONS ON RASHI
Rashi writes that they bless with Shem ha'Mefurash. What is this, and where is this done?
Sotah 38a: In the Mikdash, Hashem's name is pronounced like it is written 1 (with Yud-Kei - Rashi 38a). Outside the Mikdash, a Kinuy 2 is said (Aleph-Dalet).
R. Bechayei: It is Hashem's 12-letter name, which contains His four-letter name three times, with different Nekudos.
Gevuras Ari (Yuma 66a, citing Rav Hai Gaon): It is Hashem's 42-letter name.
Tosfos Yom Tov (Yuma 6:2, citing RaMaK) - people fell down only when the Kohen Gadol said Shem ha'Mefurash in Avodas Yom Kipur. Perhaps at all other times it was said with the Nekudos of Shem Aleph-Dalet.
Kol Eliyahu: The former is "Shmi"; the Kinuy is a mere Zecher of His name. "V'Samu Es Shmi" teaches Birkas Kohanim in the Mikdash; the Sifri includes outside the Mikdash from "b'Chol Makom Asher Azkir Es Shmi" (Shemos 20:21).