Charles R. Swindoll said this quote
“ [Jesus] tilted His head back, pulled up one last time to draw breath and cried, Tetelestai! It was a Greek expression most everyone present would have understood. It was an accounting term. Archaeologists have found papyrus tax receipts with Tetelestai written across them, meaning paid in full. With Jesus' last breath on the cross, He declared the debt of sin cancelled, completely satisfied. Nothing else required. Not good deeds. Not generous donations. Not penance or confession or baptism or...or...or...nothing. The penalty for sin is death, and we were all born hopelessly in debt. He paid our debt in full by giving His life so that we might live forever. ”