Because of the centrality of bread in the diet, and because we must eat to live, bread is also a symbol for what sustains of life. That is its primary symbolism - bread supports life. Psalm 104:15 says that bread . . . strengthens man's heart, and in other places, bread is said to refresh the heart (Genesis 18:5; Judges 19:5).
We will turn our focus now, and consider the wine of Passover. It symbolizes Christ's blood, which is another complex symbol. In the context of a meal - and especially a feast such as Passover - bread stands for the enjoyable food that provides strength and physical satisfaction. However, wine adds another quality to the meal above simply a full belly. While bread is said to strengthen man's heart, Psalm 104:15 says wine makes his heart glad. Wine causes rejoicing. Judges 9:13 says that wine cheers both God and man.