Birkat Cohanim_eye contact

(23) Speak to Aaron and his sons: Thus shall you bless the people of Israel. Say to them: (24) The LORD bless you and protect you! (25) The LORD deal kindly and graciously with you! (26) The LORD bestow His favor upon you and grant you peace! (27) Thus they shall link My name with the people of Israel, and I will bless them.

(12) Then a spirit carried me away, and behind me I heard a great roaring sound: “Blessed is the Presence of the LORD, in His place,”

(Bamidbar 6:25) "The L-rd cause His countenance to shine upon you": He will give you "light" of the eyes. R. Nathan says: This refers to the light of the Shechinah, as it is written (Isaiah 60:1-2) "Arise, shine, for your Light has come. For the darkness will cover the earth, and a thick mist, the peoples, but upon you the L-rd will shine, and His glory will be seen upon you," (Psalms 67:2) "G-d will favor us and bless us. He will cause His countenance to shine upon us, Selah," (Ibid. 118:27) "… and He shone for us." Variantly: "The L-rd cause His countenance to shine upon you": This refers to the light of Torah, as it is written (Proverbs 6:23) "For a mitzvah is a lamp, and the Torah, light." "and be gracious to you": in (the granting of) your requests, as it is written (Shemot 33:19) "And I shall be gracious to whom I shall be gracious, and I shall be merciful to whom I shall be merciful." Variantly: Let Him grant you grace in the eyes of man, as it is written (Bereshit 39:21) "And He granted him grace in the eyes of the overseer of the prison," and (Esther 2:14) "And Esther found favor in the eyes of all who saw her," and (Daniel 1:9) "And G-d granted Daniel grace and mercy," and (Proverbs 3:4) "You will find favor and goodly wisdom in the eyes of G-d and man." Variantly: "and be gracious to you": with understanding, insight, mussar, and wisdom. Variantly: "and be gracious to you": in Torah study, as it is written (Proverbs 4:9) "It (Torah) will set a chaplet of grace upon your head," and (Ibid. 1:9) "For they (words of Torah) are a chaplet of grace to your head and a necklace to your throat." Variantly: "and be gracious to you": with gifts of "grace," as it is written (Psalms 123:2) "Behold, as the eyes of servants to their masters; as the eyes of a maidservant to the hand of her mistress, so are our eyes to the L-rd our G-d, until He grants us grace," and (Ibid. 3) "Grant us grace, O L-rd, grant us grace, for we are fully sated with contempt, and (Isaiah 33:2) "O L-rd, grant us grace, for in You have we hoped."

ואני אברכם, “and I will bless them.” G-d will bless the Israelites in response to the priests invoking this blessing. The priests are never to take credit for having blessed the people, as the blessing stems from the Lord whose messengers they are.[There are commentators who understand the above words to mean that if and when the priests bless the people as prescribed, G-d, in turn will bless them. (Rashi). Ed.]

Do not wonder and say, "Of what use is the blessing of this ordinary person?" The acceptance of the Benediction does not depend upon the priest but upon the Almighty, as it is said, "So shall they put My name upon the children of Israel, and I will bless them" (Numbers 6:27). The priests fulfill their duty with which they have been charged, and the Almighty, in His mercy, blesses Israel according to His will.