What the Bible says about Seed as the Word of the Kingdom
(From Forerunner Commentary)

Matthew 13:19 Jesus clearly says that the seed is "the word of the kingdom" (verse 19). It is what He plants in us to draw us out of this world and gives us an opportunity for salvation. It is the truth, the knowledge of God, the gospel, the whole counsel of God. It is described by many different terms. Richard T. Ritenbaugh Parables of Matthew 13 (Part 1): The Mustard Seed Related Topics: Parable of the Mustard Seed | Seed as Metaphor | Seed as Metaphor of God's Word