Almost all Jewish holidays, especially the Passover Seder where all present drink four cups of wine, on Purim for the festive meal, and on the Shabbat require obligatory blessings over filled cups of kosher wine that are then drunk. (However, if no wine is present, the blessing over challah suffices). At Jewish marriages, circumcisions, and at Redemption of First-born ceremonies, the obligatory blessing of Borei Pri HaGafen ("Blessed are you O Lord, Who created the fruit of the vine") is almost always recited over kosher wine (or grape juice).
Also see: On-line Kosher Wine StoreAccording to the teachings of the Midrash, the "forbidden fruit" that Eve ate and which she gave to Adam was the grape from which wine is derived, though many would contest this and say that it was in fact a fig. The capacity of wine to cause drunkenness with its consequent loosening of "inhibitions" is described by the ancient rabbis in Hebrew as nichnas yayin, yatza sod ("wine enters, [and one's personal] secret[s] exit"), similar to the Latin "in vino veritas". Another similarly evocative expression relating to wine is: Ein Simcha Ela BeBasar Veyayin—"There is no joy except through [eating] meat and [drinking] wine".)