ברכת כהנים
The special role of the Kohanim comes into play with the ברכת כהנים, the priestly blessing. Hashem uses the individual Kohein as his messenger to bless the nation of Israel.
It is said that the reason we are not allowed to look at the hands of the כהנים when they give their blessing, is because the שכינה, Divine Presence, passes through the fingers of the כהן.
There are three specific blessings in the ברכת כהנים. The first speaks about Hashem’s protection. Rashi says this refers to protection from demons. This is represented by the word, וישמרך, protection.
The second blessing of ויחנך, refers to Hashem showing favor and kindness to every Jew. There is a hint here that ברכת כהנים nullifies bad dreams.
And the final blessing of ישא, that Hashem should lift His face towards us. This is an indication that when Hashem is able to look at us, it is an indication that He is happy with us. When someone is unhappy with someone else, he is not able to look at him in the eye. Our third Bracha is a blessing that Hashem should be pleased with us.
If we live in Israel, ברכת כהנים is said 450 times a year. Outside of Israel, it is recited about ten times. This is another benefit of living in Israel.