What does the Bible say about the growth of Christ's kingdom?

In Matthew 13:24-43, Christ utilizes parables to illustrate the nature of His kingdom, highlighting both its growth and the coexistence of true believers with false ones. The parable of the wheat and the tares encapsulates this dual reality, revealing that while the good seed represents the children of the kingdom, the tares symbolize those sown by the enemy. This growth continues until the harvest, portraying the ultimate separation of the righteous and the wicked at the end of the age. As believers, we are called to recognize the presence of both within the church, understanding that God's sovereign grace works through the gospel to save His elect across all nations.