Why is believing in Jesus' kingdom important for Christians?

For Christians, belief in Jesus' kingdom is essential as it provides hope for eternal life and assures that God's promises will ultimately be fulfilled. Jesus himself highlights this when he calls for repentance and faith in Mark 1:15, indicating that entry into his kingdom requires a recognition of one's need for salvation. By placing faith in Jesus, believers are granted a new identity and purpose, transforming their lives and relationships in this world. Moreover, understanding that Jesus' kingdom transcends earthly borders encourages Christians to live distinctively, motivated by the kingdom's principles of love, justice, and mercy, while awaiting the consummation of that kingdom in eternity.