With a blessing befalls the bestowment of divine favour and protection, one of great privilege and, yes, honour. It brings, however, with it great responsibility. By and by, then, it could be viewed as a double-edged sword. That it cuts both ways. For every blessing received, G-d expects a return on His investment. We are to make something of it; disseminate its fruits.

The Aaronic Blessing

Shefa Tal: During the course of the blessing, the hands of the Kohanim are spread out over the congregation, with the fingers of both hands separated so as to make five spaces between them. The Kohen raises his hands, with the palms facing downward and the thumbs of his outspread hands touching. The four fingers on each hand are customarily split into two sets of two fingers each (thus forming the letter Shin (שׁ), an emblem for Shaddai, “Almighty [G-d]”) [Text and image: Wikipedia]