The Eighth Day | Shemini
In this lecture “The Eighth Day | Shemini” we discuss the concepts from (Likkutei Sichos, Vol. III, p. 973ff) The number eight shares a connection to the Era of the Redemption, as our Sages state: “The harp of the Era of the Redemption will be of eight strands” (while the harp used in the Beis HaMikdash had seven strands).
The revelations of the Era of the Redemption will also follow the motif described above. Thus in describing those revelations, our prophets say:20 “And the glory of G-d will be revealed and all flesh will see.” “The glory of G-d” refers to a spiritual peak21 above the natural order. This level will be “seen,” perceived openly, by “all flesh”; mortals within our material world will realize this spiritual truth. – Chabad