How do we know the kingdom of God is at hand?

In Mark 1:14-15, Jesus declares that the kingdom of God is at hand, signifying a pivotal moment in redemptive history. This announcement fulfills prophecies in the Old Testament and indicates that God's reign is now accessible through Christ. The presence of Jesus and His ministry are clear indicators that the kingdom, which was anticipated and awaited, has arrived to transform hearts and lives. The promises made to the people of Israel are realized in Christ, establishing the true kingdom of righteousness and peace in those who believe.