The Kingdom of God grows from seeds. A seed in Kingdom terms is Jesus. The planting of seeds is the planting of Jesus in hearts, minds and lives. God’s priests and kings grow because Jesus is planted and nurtured in them.
The Father planted Jesus and Jesus planted Himself in His disciples. At Pentecost Jesus planted Himself in all believers. It is the living Christ, not an icon or a theological construct who represents real love and the authority of the Kingdom of Heaven.
In Jesus we are the church and are arranged as His Body to multiply life without measure.