For the “food of everlasting life” (stanza 1) see John 6:27-58.
For the “light of truth” (stanza 2) see John 1:4-9 and 8:12.
For the “wine of everlasting life” (stanza 3) see John 6:53-58.
This Christmas song sets in contrast the gift from heaven that is celebrated around the manger with the gift that is celebrated at the table—the reason for the newborn in the manger. The metaphors here of Christ as the bread from heaven and of the banquet from heaven (stanza 1) and the wine of love (stanza 3) are reminders of the Lord’s Supper which Christ instituted as a way of remembering him and of being nurtured with the food of everlasting life (stanza 1). The words “taste and see,” in stanzas 1 and 3, are reminders of the invitation of Christ in the upper room to “take…eat…drink...”
It is worth considering Belgic Confession, Article 35, as a reminder to recognize the “spiritual and heavenly bread…by which our life is sustained.”
Heidelberg Catechism, Lord’s Day 29, Question and Answer 79 also brings to mind that these elements are the “true food and drink of our souls for eternal life.”
In stanza 1 of “What Feast of Love,” the “food of everlasting life” is a reference to the way in which Christ “nourishes and refreshes my soul for eternal life” (Heidelberg Catechism, Lord’s Day 28, Question and Answer 75) and that “his crucified body and poured-out blood are the true food and drink of our souls for eternal life” (Heidelberg Catechism, Lord’s Day 28, Question and Answer 76).