For the Siyum of Tanis.
The Jews are sitting in a circle and Hashem is the middle and they are pointing to Him recognizing that He is the only One who can redeem us.
Why a circle?
It says Hear o’ Israel Hashem our God is Hashem, One. It also says who is like your nation Yisrael one nation.
We will show that they are both the same one.
The kedusha through the center has a magnetic affect by pulling the circle towards the center making the circle smaller and smaller, uniting the points and eventually coinciding with the center. Also, the holy Zohar says that Yisrael and the Torah with Hashem kavayachel is one. Through the observance of the Torah we become united, making the circle smaller and coinciding with the center.