Lk 14:15-24
The great dinner: The allegory is easy to understand. The man who gives the big dinner, a metaphor for the messianic banquet, is God. Those who are invited (Israel) excuse themselves, when the servant (prophets) delivers the invitation to them.
The invited are too preoccupied with daily concerns. These people who make the excuses are not Luke’s primary concern, however. He is interested in those whom the master invites to the dinner after the originally invited guests refuse to come. Those who respond to the second and third rounds of invitations are the blessed in the kingdom of God.
Who is in the kingdom of God? The poor and the crippled, the blind and the lame—the first group to be rounded up from the streets and alleys of the town—are in the kingdom of God. These are the same people that Jesus earlier told his host to invite to his dinner (cf 14:13).
However, even all of these do not fill the banqueting hall. So the master tells the servant to get more people in. This second recruitment of people for the kingdom represents the Gentile mission, which will be further developed in Luke’s second volume, the Acts of the Apostles.