And thus did the sages of the Mishnah establish:lxxivBT Sukkah 37b ‘one brings back and forth’, to Whom the four winds of the earth belong, ‘one raises and lowers’, to Whom the heavens and the earth belong.
The three myrtle leaves are the body and two arms, and they correspond to the eye and two ‘wings’ of the eye eyelids. The two strands of willow correspond to the two thighs, and they correspond to the two lips.
And when they are all one bunch, with the lulav, which is the spine, what is written? (Song. 7:9) I said: ‘I shall ascend’ (E-)’ELeH the palm... acronym of: Aleph א is the Etrog (citron), ’Ayin ע is the ’Aravah (willow), Lamed ל is the Lulav (palm-branch), Hei ה is the Hadass (myrtle). All are made [to correspond to] the four ‘species’ of the chariot. The One who rides upon them is YQV”Q.