One of the 30-cubit, goat-hair curtains on the outside of the Tabernacle is folded over the front of the tent (Exodus 26:9; see Thirty Cubits and Cloaking) for more on the curtains). Two aspects of this are emphasized in the commentary of Kedushat Levi, among others:
Folding: Folding [כפל, khaphal] is related to the idea of “klipah” [קלפה], the protective shell covering God’s Light in the world, according to mystical teaching. Kedushat Levi links the folding of the curtain and God’s cloaking, to protect humans from what they cannot withstand, adding that “folding over” implies reinforcing something not otherwise as strong as necessary. (Kedushat Levi, p. 473; full citations for Kedushat Levi, Stone Chumash in Source Materials.)
Half: Kedushat Levi also emphasizes the fact that the curtain is folded in half. He links “half” to “awe” through a play on the Hebrew words: the curtain, folded in “half” [חצי, chatzi], is linked via “crush” [מחץ, machatz] to “awe.” (More below.)
Additional thoughts on the concept of “half,” regarding the command to collect a half-shekel as part of the census embedded in the Tabernacle story, suggest a different direction:
Many commentators interpret homelitically that the requirement of half a coin alludes to the concept that no Jew is complete unless he joins with others; as long as we are in isolation, each of us is only “half” of our full potential.
— Stone Chumash, on Exodus 30:13
Combining these views on folding and half seem to suggest that any approach to God is best accomplished in community.