Among Hoshanah Rabba’s aspects is love. After we beat the aravos, we say יהי רצון וכו' ותתעורר האהבה ביניהם ותנשקנו מנשיקות פיך – “May it be Your will... that the love will be awakened between them and You will kiss us with the kisses of Your mouth.” Sukkos expresses love. The Halachic shape of a valid sukkah – two adjacent walls and a third, small one – forms the shape of an arm giving an embrace. The sukkah is an embrace from Hashem.
Hoshana Rabba, the “Day of aravah,” expresses love even more intensely. The shape of aravah resembles the lips. Hoshana Rabba is a kiss from Hashem, and a kiss is an even greater expression of love.
When it came time for Moshe Rabbeinu to leave this world, Moshe’s soul did not agree. It did not want to leave such a sanctified body. In the end, Hashem gave him a “kiss” and thereby took his soul.
