Matthew 13:51-52 Old And New.
It is one thing to read or hear the parables, but it is quite another thing to understand their meaning. Some will hear but not understand, or see but not perceive (vv. 14-17; 34-35). Jesus, the Lord, is the great teacher (v. 51), and as such he is the householder who brought and brings out treasures new and old (v. 52 Cf. Heb. 3:6). That which is found in the older testament scriptures is combined with the new covenant canonical witness, to give the full light of the revelation of the mystery of the gospel of the kingdom