At the outset, note that in the context of the parable, the wedding “feast” is not a concept or a doctrine to be defined, but a symbol, a means of bringing together parts of reality. I dare say that the primary goal of Jesus in his preaching and ministry is to bring together parts of reality: to reconcile or “join together again” Divine and human reality. If anyone knows of someone who has done more to reunite God and human beings in one “wedding feast,” in one union, please tell me about this extraordinary person. As far as I know, he is the one we call Jesus, the Christ--the bridge between God and man.
Consider several meanings of the “wedding feast” symbol:
-- To become a disciple of Jesus, to share in his community under God, is to share in the wedding feast: “Come, follow Me” to the cross and Resurrection.
-- To partake willingly and imaginatively in the Eucharistic banquet is joyfully to share in the feast: “Take and eat, this is my body... for you.” Some refuse.
-- To do the will of God the Father, regardless of the cost to one personally, is to share in God’s feast. Some “want the crown, without the cross.”
-- To enter into full union with God beyond death, in what is often called “heaven” or “the Kingdom,” is surely to enter into the wedding feast of the Lamb for eternity.
-- To enter into a spiritual union with God through “faith working through love” is most essentially to share in the wedding feast of God and you.
Note well that Jesus employs the symbol of the wedding feast to diagnose non- responses to God’s free offer: Some people scorn the offer, and refuse; others enter in, but unworthily. Again, we are being called to change our ways to enter into the joy of the LORD. Christ seeks to transform us, with our cooperation, into the image of God.