The commentaries (Pesachim 99a, s.v. "kulhu nami") and the Meiri (Pesachim, Chapter 10) discuss the significance of the explanations given for the Four Cups of wine during the Passover Seder. The commentaries state: "And all four cups require an explanation at the time of drinking." The Meiri writes: "All four cups require explanation, whether it is their drinking or the elements that are arranged around them, meaning Kiddush, reading the Haggadah, reading Hallel, and Birkat Hamazon (Grace after Meals), and if one explains throughout the entire meal, this is praiseworthy." It appears from the explanations of the different opinions that the commentaries believe that wine is considered a mitzvah in its own right, separate from the meal, and therefore the explanation should be given only at the time of drinking. On the other hand, the Meiri's approach, following the Rambam, is that the obligation to explain arises from the principle that "a person must show himself as if he personally left Egypt," and therefore the explanation should also be given at the time of fulfilling the mitzvot associated with the Four Cups.