How do we know that God saves us completely?

The doctrine of complete salvation is rooted in the belief that Christ's work on the cross was sufficient for our redemption. In the sermon, it is asserted that there is nothing left for us to do; Christ's sacrifice and resurrection completed the necessary work for our salvation. This reflects the biblical truths seen in passages such as Hebrews 10:14, which states that by one offering, He has perfected forever those who are being sanctified. Our dependence upon God's grace reinforces the assurance that we are fully saved, both from eternal consequences and from the power of sin in our daily lives.