Holy Zohar text. Daily Zohar -191.

Tikkun 18 Continue

On Shabbat, Malchut is elevated to Binah and we have the opening to the upper three Sefirot.
All prayers and connections can reach to a higher level.

Ezekiel 46:1 “…The gate of the inner court that faces east will be close six working days but on Shabbat day it will be open and on the day of the new moon it will be opened”

The Holy Temple had represented all spiritual dimensions. The East side has the energy of Chessed and it is close to the Inner court, which is Chokmah Binah and the Holy of Holies connected to Keter.

Only on Shabbat there can be a flow from the upper three Sefirot to the lower seven.
Also on the first day of the moon when there is a renewal of the month then a new energy appears from the upper levels.

The connection requires connecting with the Hebrew letters and especially the Torah reading and reciting the Shema Yisrael prayer.