How do we know redemption is effectual?

The effectual nature of redemption is grounded in the belief that Christ's death was not a mere potentiality for salvation but an accomplished fact. In John 19:30, Jesus proclaimed, 'It is finished,' indicating that the work of redemption was completed at Calvary. This act was designed for God's elect, meaning it does not wait for human decision but is established through God's sovereign will. Redemption is already effectual and accomplished for those chosen by God before the foundation of the world, ensuring that all for whom Christ died will be saved.