What does the Bible say about entering the kingdom of God?

According to the teaching in this sermon, entering the kingdom of God is exclusively by the grace of God, who chose His people in Christ before the foundation of the world. This grace is manifested in God's sovereign election and calling, which is not based on any merit or works of the sinner. As stated in Ephesians 1:4-5, God predestined us for adoption as His sons through Jesus Christ, according to His purpose and will. Furthermore, Jesus emphasized in Matthew 25:34 that the kingdom was prepared for His people from the foundation of the world. This indicates that God’s plan has always included a chosen people who would be called into His glorious kingdom through the grace provided in Christ.