30 Then He said, “To what shall we liken the kingdom of God? Or with what parable shall we picture it? 31 It is like a mustard seed which, when it is sown on the ground, is smaller than all the seeds on earth; 32 but when it is sown, it grows up and becomes greater than all herbs, and shoots out large branches, so that the birds of the air may nest under its shade” (Mark 4:30–32, NKJV).
There are many speculative and erroneous anticipations about the kingdom of God. Jesus described the nature of God’s kingdom (not of this world, spiritual, John 18:36) and when it would be established (before His generation passed away, Mark 9:1). To look for the kingdom’s future coming misunderstands and misapplies “the gospel of the kingdom of God” Jesus preached (Mark 1:14). The kingdom Jesus preached and established is His church (Matt. 16:18-19). Today’s parable pictures the growth of God’s kingdom. Despite its humble beginnings (like the tiny mustard seed, it would fill the earth (Isa. 2:1-4; Dan. 2:35; Matt. 28:19-20). Its humble start is in keeping with the humility of Jesus its king (Zech. 9:9; Mark 11:1-10). The kingdom’s seed, the word of God, is planted in good hearts that bear good fruit (Mark 4:14, 20). The kingdom of God did not come with military might and fanfare. It comes is within the hearts and lives of those who receive its gospel (Luke 17:20-21). From Pentecost in Acts 2 (through gospel preaching), the kingdom spread from Jerusalem to Judea and Samaria to the end of the earth (Acts 1:8). Human armies do not defeat this kingdom; it is enduring, unshakeable (Heb. 12:28). All who receive the word of the kingdom (the gospel) and hold it fast obtain salvation, divine comfort, and the eternal provisions of citizenship in the kingdom of God (Col. 1:13-14; Eph. 1:3; Phil. 3:20).