How do we know that salvation through Christ is guaranteed?

The assurance of salvation through Christ arises from the fact that He bore the penalty for our sins and intercedes for us as stated in Romans 8:33-34. It emphasizes that it is God who justifies, and since our sins have been paid for by Christ, we cannot be separated from His love. Our salvation is not based on our works but on the finished work of Christ at Calvary, which secures our position before God. This unchangeable nature of salvation gives believers deep confidence in their standing with God.