We often talk about how God works through material elements in the sacraments to convey His grace in Christ. But I came across a quotation that adds a dimension I never thought of before. The water of Baptism is certainly a natural substance, but the bread and wine of Holy Communion do not occur from nature alone. As James K. A. Smith points out, they require culture. And I would add, they require vocation.
From James K. A. Smith, Desiring the Kingdom (Grand Rapids: Baker Academic, 2009), 200:
After all, it’s not wheat and grapes that are on the table, it’s bread and wine. These are not naturally occurring phenomena; they are the fruit of culture, the products of human making. . . .The affirmation of the goodness of creation includes not just the furniture of “nature” but also the whole panoply of cultural phenomena that humanity, by its cultural labor, teases out of creation.