In the Hallel prayer we recite this verse: "This is the day G-d wrought, we will rejoice in it/Him." The Midrash asks about this last word: Is it "it," or "Him?" That is, are we supposed to rejoice in the day, or in G-d?
Despite the apparent disparities between the High Holidays of Rosh Hashanah and Yom Kippur on the one hand and the Sukkot festival - known as “the time of our joy” - on the other, the holidays of Tishrei in fact live quite at peace with one another.