The blood of our unblemished high priest Yeshua/Jesus is the once and for all atonement that covers and atones for our sins. The blood of Messiah/Christ Heb9:14 “cleanses our consciences from acts that lead to death, so that we may serve the living God.” Heb 9:22 “ In fact, the law requires that nearly everything be cleansed with blood, and without the shedding of blood there is no forgiveness.”
