Why is Moses not allowed to enter the Promised Land?

Moses represents the law, and his inability to enter the Promised Land symbolizes the law's limitations. In Numbers 20:12, God tells Moses that because he did not believe Him to sanctify Him before the people, he will not lead them into the land. This signifies that the law's role is not to bring us into the promise of salvation. The only one who can lead us there is Jesus (Joshua), whose name means 'Savior.' The incident illustrates that the law cannot redeem or grant us eternal life; we must rely on God’s grace.