The theme for the 1991 Institute of Liturgical Studies is taken from the hymn "Now the Green Blade Rises." This wonderful Easter hymn, No. 148 in The Lutheran Book of Worship, concludes each stanza with the refrain, "Love is come again like wheat arising green." The resurrection of Jesus is portrayed as grain which sprouts from seed. The imagery comes from the Gospel of John, from a saying of Jesus, the whole context of which is instructive.
Bouman, Walter R., "Like WheatT Arising Green: How the Church Grows and Thrives" (1992). Institute of Liturgical Studies Occasional Papers. 62.