How do we know that Christ is sovereign and our mediator?

The sovereignty of Christ and His role as mediator are foundational to sovereign grace theology. Passages like Romans 8:28-30 and Isaiah 32 affirm that Christ reigns in righteousness, being appointed by God as the only mediator between Himself and humanity (1 Timothy 2:5). This sovereign role is necessary for salvation, as He satisfies God's justice while offering mercy, thus upholding God's holiness. His dual nature as fully God and fully man equips Him as the perfect mediator, fulfilling the requirements of both divine justice and human need.