We are told to sow, we scatter the seeds of faith, notice He does not say the farmer planted the seeds, just that he scattered the seeds.

    Some hear the Word, become a Christian, but don't understand the message of repentance (turning from sin), the enemy steals the seeds planted and this one goes back into the world.

     Some hear the Word, become a Christian,are growing in faith, but when persecution comes, he is offended and stumbles back into sin.

    Some hear the Word, become a Christian, grows in the Lord, but riches, and worldly possessions strangle him, and becomes unfruitful, unfit for the Kingdom of God.

    And then some read the Word, become a Christian, grow in the Lord, and live according to His commandments to love the Lord, and to love his neighbors. He is fruitful in the Kingdom, bringing other souls into the Kingdom.