The message of the four cups on Passover[1]
מה נשתנה הלילה הזה מכל הלילות
Why[2] is this night different than every other night?[3]
In the four questions we list four differences that are prominent on the night of the Seder as opposed to other nights: eating only matzah and no leavened bread, eating marror (bitter herbs), dipping two times[4], and eating and drinking while reclining. A difference that’s neglected is the obligation to drink four cups of wine, which doesn’t exist on other nights. Why is this difference not mentioned in the Haggadah?