“The festival of Sukkot, which comes after the Days of Awe, is a time of reconciliation and joy.
The Midrash (Leviticus Rabbah 30:2) likens holding the Lulav to a triumphal parade, in which we proclaim our certainty that we have been vindicated before God.”
–Rabbi Adin Steinsaltz
From A Guide to Jewish Prayer, p. 169, by Rabbi Adin Steinsaltz