Misinterpretations of Hebrews 9:15 often include limiting Christ's redemption solely to sins under the old covenant, overlooking its application to all sin for believers under the new; confusing 'new testament' with the Bible's written text rather than the covenant inaugurated by Christ's death; or assuming automatic inheritance for everyone without the necessity of being effectually called through the gospel and personal faith, which distorts the passage's emphasis on divine calling and mediation.
Hebrews 9:15
King James Version (1769)
15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.
Hebrews 9:15 teaches that Christ is the mediator of the new covenant, and his death redeems the transgressions committed under the old covenant, enabling those who are called to receive the promised eternal inheritance. This underscores the superiority of Christ's sacrifice, which fulfills and surpasses the old system's temporary atonement, securing everlasting redemption for believers through faith in his blood.