How do we know the atonement is sufficient?

The sufficiency of Christ's atonement is a critical aspect of Reformed theology, articulated in the doctrine of Limited Atonement. It is taught that the death of Christ was effective for the elect, ensuring that those for whom He died will surely be redeemed. The opposing view, which claims a universal atonement, undermines the very nature of the cross's sufficiency by implying that additional conditions, such as human faith, are necessary for salvation. Scriptures affirm that it is by Christ's blood that His people have been redeemed, solidifying the belief that His sacrifice fully satisfies divine justice for the elect.