As it is written in The Book of Zohar, When the Cohen extends his hands, the Shechina dwells on his fingers, because the Creator agreed with the Cohen in these blessings. Israel is blessed from above, from the Shechina that dwells on his fingers, and from below, from the Cohen, pronouncing a blessing.
The prayer of the Cohen (priest) has a very interesting effect. He is covered by a special cloth called a Tallit and holds his hands up in a certain manner and says, “The Lord bless you,” and so forth.
At the same time, the people must not look at him because the priest embodies the Upper Light which is forbidden to look at directly, only through a Masach (Screen), the Returning Light, received with the preparation of the intention of in order to bestow.
Therefore, everyone present lowers his eyes. There is nothing special in this corporeal action in our world except for a hint of the inner spiritual state of a person who receives the Light of an upper state.
It is said that, “When the Cohen extends his hands, the Shechina dwells on his fingers.” This is a condition where the Upper Light passes through all nine Sefirot up to Malchut, through all the states of Yod-Hey-Vav-Hey of the Creator’s name, and thus imprints in Malchut.
Malchut, by itself, produces the Returning Light (Ohr Hozer). This says, Amen. “Amen” means truth. This word is commonly used, but hardly anyone understands its true value.
When Malchut says “Amen,” it means that it receives everything that descends down on it from above and becomes the recipient of the first nine Sefirot.
In other words, if it is ready to receive the nine Sefirot, it becomes Nukva, the female part of the nine Sefirot, and it represents the whole nation.
From KabTV’s “Secrets of the Eternal Book” 1/28/15