Every holiday has its own particular quality, its own essence and spirituality, so that the way it is celebrated and the whole attitude of the soul toward it is different.
The annual cycle goes from Passover, the memorial day for the beginning of the life of the soul and for the life of the nation, through the feast of Shavuot, the time of overcoming resistance and obstacles and the commemoration of the receiving of the Torah, which is the standing forth before the Supreme, until the feast of Succot, which is the time of ripening and maturity and reward.
–Rabbi Adin Steinsaltz
From "Mitzvot" in The Thirteen Petalled Rose by Rabbi Adin Steinsaltz