The Angel Mettatron is the chariot to the Shechina below. He also the connection above for the unification of the soul levels of Nefesh, Ruach and Neshamah.
Metatron is gematria 314, same as שדי, which is a name we put of the door post to protect the connection to our dwelling place. Metatron is the connector between the circle (Pi, 3.14….), which is the Endless and the line, which is the process, the Ten Sefirot all that is in our limited dimensions, controlled by time.