How do we know if Christ died for us?

The question of whether Christ died for an individual is a matter of genuine faith in His atoning sacrifice. As expressed in Hebrews 10:10-12, Christ's one-time sacrifice was sufficient for all those He chose for salvation. The assurance that someone is among the elect is often found in their heartfelt belief in Jesus as their Savior and Lord. The account of the thief on the cross illustrates this truth; he expressed faith in Christ at the point of death, demonstrating that true belief—obtained through God's grace—clarifies one’s standing with salvation. Therefore, those who have a sincere trust in Christ's work can confidently affirm that Christ died for them.