How do we know Christ's continuous grace is essential for salvation?

Christ's role as a living Mediator is fundamental, as believers require continual supplies of His grace to maintain spiritual vitality. The necessity of Christ’s grace extends beyond His sacrificial death; it includes His ongoing life and work as the resurrected Savior. The grace received allows believers to love God, submit to His will, and endure trials. This ongoing relationship and reliance on Christ’s grace serve as evidence of true spiritual life, affirming His ongoing role in salvation.