How do we know that God commands belief in Him?

The command to believe on the Lord Jesus Christ illustrates God's sovereignty and authority over humanity. This command is not a suggestion but rather a divine directive emanating from God's ultimate authority as the Creator. Romans 9 emphasizes God's right to have mercy on whom He wills and to harden whom He wills, demonstrating His sovereign control over salvation and belief. The fact that belief is mandated indicates that it is part of God's redemptive plan, showing that He orchestrates the desires and understanding necessary for faith.