What do the parables of Jesus teach about the kingdom of heaven?

Jesus employed parables to convey deep truths about the kingdom of heaven. For instance, the parable of the mustard seed in Matthew 13:31-32 demonstrates how God's kingdom starts small yet grows into something vast and significant. Similarly, the parable of the leaven mentions how the gospel works gradually in the hearts of believers, transforming them over time. These teachings reveal that while the kingdom may appear insignificant at first, it holds eternal significance and unfolds according to God’s sovereign plan. Ultimately, these parables call for believers to recognize and not underestimate the work God is doing in their lives and within the church.