Commentators often omit this verse from discussions of the parables in this discourse.573However it contains a parable as should be clear from the content of the verse itself and from the structure of the discourse.
Jesus drew a comparison between a scribe instructed about the kingdom and the owner of a house. In view of what follows the scribe in view seems to be one who received instruction about the kingdom and believed it. He is a disciple. As with the owner of a house, this type of scribe brings new and old things out of his storeroom or treasure (Gr. thesauros). The owner of the house in the parable brings things out of his storeroom to use them beneficially. The storeroom from which the disciple scribe brings these things is evidently his heart or understanding (i.e., his very being). He brings out new understanding concerning the kingdom that Jesus had taught him as well as old understanding about the kingdom that the Old Testament taught him. The new did not displace the old but supplemented it. Jesus was comparing His believing disciples to this believing scribe. They had just said they understood what Jesus had taught them (v. 51). Therefore they had a responsibility to teach others what they now understood. Every disciple must become a scribe, a teacher of the law, because he or she understands things that require communicating to others (cf. ch. 10:27; 28:19; Heb. 5:12).
"The first two parables relate to planting. The parable of the sower speaks of different responses to the message of the kingdom. The parable of the tares explains the origins of the conflict between the sons of the kingdom and the sons of the enemy and announces that a final separation of the two groups will take place when Jesus, the Son of Man, will return at the end of the age. The second pair of parables utilizes the analogy of growth. The mustard seed reveals the extent of the rapid international growth of the kingdom of heaven, and the leavening process addresses the internal and invisible dynamic of that growth. The next two parables (the treasure and the pearl merchant) address the value of the kingdom. Whether one is looking or not looking, no sacrifice is too great for the kingdom. The final set of parables reveals the disciples' dual responsibilities. The dragnet teaches that evangelism without discrimination should be done in view of Jesus' discriminating judgment at the end of the age. The householder encourages the teaching of both the older and newer truths of the kingdom of heaven by the disciples of the kingdom."574
